Chasm Stainless Steel Cum-Thru Urethral Insert - The Dildo Hub

Chasm Stainless Steel Cum-Thru Urethral Insert

Estimating delivery…! Order before 1 PM PT on weekdays and your order ships the same day. Our team will reach out if we need any extra delivery details.

The quick take

Folks, meet the Chasm — a hollow stainless steel urethral insert designed for wearable pleasure during sex and climax. The ultra-thin 0.10-inch diameter (approximately 2.5mm) makes this an ideal beginner… Read more

Compare at $74.75 | You Save $38.71 (51% OFF total after code JOLLY20)

$36.04

$45.05

After code JOLLY20 ($9.01 additional savings)

We accept

We ship via

As seen in

The Dildo Hub has been featured in leading publications covering modern sexuality and wellness.

What is a hollow cum-thru urethral insert? Hollow urethral inserts (also called cum-thru plugs or penis plugs) feature an open channel that allows urination and ejaculation while worn. Unlike solid urethral sounds designed for temporary insertion, hollow inserts can be worn during sex for unique internal stimulation throughout arousal and climax. The ball stopper prevents full insertion while adorning the glans visually. In our experience curating urethral jewelry and wearable sounds, the hollow design transforms urethral play from session-based exploration into extended wear pleasure — you can keep it in during masturbation, partnered sex, or daily activities.

Product Description — Chasm Stainless Steel Cum-Thru Urethral Insert

Folks, meet the Chasm — a hollow stainless steel urethral insert designed for wearable pleasure during sex and climax. The ultra-thin 0.10-inch diameter (approximately 2.5mm) makes this an ideal beginner urethral sound, while the 2-inch insertable length provides comfortable internal stimulation without overwhelming depth. The gradual taper widens slightly as it enters, creating gentle stretch sensation. Most importantly, the hollow cum-thru design allows natural urination and ejaculation while worn — no need to remove before orgasm. The decorative ball stopper prevents full insertion and adorns your glans sensually. At 0.14 lbs, this lightweight penis plug provides discreet all-day wear or intense sexual enhancement.

Best for: Beginners exploring urethral play with ultra-thin sizing, those seeking wearable stimulation during sex, anyone curious about cum-thru hollow design for hands-free pleasure. The 0.10-inch diameter is the thinnest urethral sound size available — perfect for first-time sounding. We've found that hollow inserts create uniquely intense orgasms as ejaculation travels through the internal channel. Hypoallergenic stainless steel cleans easily with soap and water. Requires sterile water-based lube for insertion. Ships from sunny California with discreet packaging, privacy-safe billing, and free mystery goodies.

Quick specs: 2.5 in total, 2 in insertable, 0.10 in diameter (~2.5mm), hollow cum-thru design, ball stopper, stainless steel, grey, 0.14 lbs.

Key Features

At-a-glance features for the Chasm Cum-Thru Urethral Insert
Hollow cum-thru design	Open channel allows ejaculation and urination while worn — no removal needed.
Ultra-thin 0.10 inch diameter	Beginner-friendly sizing (approximately 2.5mm) — thinnest urethral sound available.
Decorative ball stopper	Prevents full insertion while adorning the glans with sensual jewelry aesthetic.
2 inch insertable length	Comfortable depth for extended wear without overwhelming beginners.
Gradual taper design	Gentle widening creates progressive stretch sensation during insertion.
Premium stainless steel	Hypoallergenic, non-porous metal allows thorough sanitization and body-safe wear.
Wearable during sex	Keep inserted during masturbation, partnered play, or penetration for added stimulation.
Lightweight 0.14 lbs	Discreet weight allows comfortable all-day wear if desired.
Discreet shipping	Plain packaging, no product names or logos.

Specifications & Care

Measurements

Total length: 2.5 in (6.4 cm)
Insertable length: 2 in (5.1 cm)
Diameter: 0.10 in (2.5 mm) — ultra-thin, beginner-friendly sizing
Design: Gradual taper with hollow center channel (cum-thru)
Stopper: Decorative ball prevents full insertion
Materials: Stainless steel
Color: Polished grey/silver
Weight: 0.14 lbs (64 g)
Lube compatibility: Water-based or silicone-based

How to Use

Hygiene is essential for pleasurable, safe urethral play. Clean the stainless steel insert thoroughly with antibacterial soap and hot water before first use. For deeper sanitization, boil for 10 minutes (stainless steel is fully sterilizable). Let cool completely before insertion. Apply generous sterile water-based lubricant to the tapered shaft and your urethral opening. In our experience with hollow urethral inserts, the ultra-thin 0.10-inch diameter makes this exceptionally easy to insert for beginners — it's the smallest urethral sound size available.

Insert slowly and gently, letting the gradual taper guide the way. You'll feel gentle stretch as the shaft widens slightly. The 2-inch insertable length provides comfortable stimulation without overwhelming depth — most folks easily accommodate the full length on first attempt due to the thin diameter. The decorative ball stopper will rest against your urethral opening when fully inserted, preventing the plug from sliding deeper and creating a sensual jewelry aesthetic on your glans.

The hollow cum-thru design is what makes this unique: you can wear it during masturbation, partnered sex, or even daily activities without removal. When you urinate or ejaculate, the fluid travels through the internal channel naturally. Customer feedback consistently shows that ejaculating with the insert in place creates intensely heightened orgasms — the sensation of cum traveling through the internal channel adds unique stimulation. Some folks wear it for hours during arousal buildup, while others insert it specifically for sexual encounters. The lightweight 0.14 lbs makes extended wear comfortable.

Care & Safety

Beginner-friendly sizing: The 0.10-inch diameter is the thinnest urethral sound available — ideal for first-time urethral play exploration.
Sanitization: Clean with antibacterial soap and hot water after every use. Stainless steel can be boiled for 10 minutes for complete sterilization.
Lube compatibility: Water-based or silicone-based lube both work with stainless steel. Use sterile lube for proper urethral sounding hygiene.
Extended wear: The hollow design allows comfortable wear during daily activities, arousal sessions, or partnered sex. Listen to your body — if you feel discomfort, remove and take a break.
Ejaculation safe: Unlike solid urethral sounds, this hollow insert allows ejaculation while worn. The cum travels through the internal channel naturally.
Ball stopper safety: The decorative ball prevents the insert from sliding too deep. Never push past the stopper — it's designed to rest against your urethral opening.
Post-session care: After removing, urinate to naturally flush your urethra. Stay hydrated. If burning during urination persists beyond 24 hours or you notice discharge, take a break and consult a healthcare provider if symptoms continue.
Storage: Store clean and dry. The non-porous stainless steel won't harbor bacteria when properly sanitized.

Why You'll Love It

The Chasm delivers wearable urethral stimulation that traditional sounding rods can't provide. That hollow cum-thru design means you can keep it inserted during sex, masturbation, or arousal buildup without interruption. When you ejaculate, the sensation of cum traveling through the internal channel creates uniquely intense orgasms — it's internal stimulation combined with natural function rather than obstruction. The decorative ball stopper transforms this from purely functional to aesthetically sensual, adorning your glans with jewelry-like appeal.

The ultra-thin 0.10-inch diameter (approximately 2.5mm) makes this the best urethral sound for beginners. In our years curating urethral toys, we've found that many first-timers feel intimidated by thicker sounds — this ultra-slim sizing removes that barrier completely. The gradual taper provides gentle progressive stretch without overwhelming sensation. Premium stainless steel construction ensures body-safe wear and allows complete sterilization through boiling, giving you confidence in hygiene practices.

Whether you're discovering urethral play for the first time or seeking wearable stimulation during partnered sex, this hollow insert offers accessible entry into cum-thru pleasure. The 2-inch insertable length provides comfortable internal stimulation without excessive depth, while the lightweight 0.14 lbs makes all-day wear feasible if desired. This is urethral jewelry meets sexual enhancement in one hypoallergenic stainless steel package.

Frequently Asked Questions

What does "cum-thru" mean exactly?

Cum-thru (also called hollow or open-channel design) means the urethral insert has a hole running through its center, allowing fluids to pass through while the insert is worn. You can urinate and ejaculate naturally without removing the plug. This distinguishes it from solid urethral sounds which must be removed before ejaculation. The hollow channel transforms this from a temporary exploration tool into wearable sexual enhancement that intensifies orgasm through internal stimulation as ejaculate travels through the insert.

Is 0.10 inches really thin enough for beginners?

Yes — 0.10 inches (approximately 2.5mm diameter) is the thinnest urethral sound size commonly available and exceptionally beginner-friendly. For context, most beginner urethral sound sets start around 4-5mm diameter, so this is nearly half that width. Customer feedback shows that first-timers appreciate the ultra-slim sizing because insertion feels less intimidating and more manageable. If you can comfortably insert a cotton swab, you can likely handle this diameter with proper lubrication.

Can I wear this during partnered sex?

Absolutely — that's one of the primary benefits of hollow urethral inserts. You can wear it during masturbation, oral sex, or even penetrative sex (though communicate with your partner first). The internal stimulation adds unique sensation throughout arousal and climax. Some partners find the decorative ball stopper visually appealing. In our experience, many couples incorporate wearable urethral plugs as shared exploration — the person wearing it experiences internal pleasure while their partner enjoys the psychological element of the adornment.

How does ejaculating through the hollow channel feel?

Most enthusiasts describe it as intensely pleasurable — the ejaculate traveling through the narrow internal channel creates additional stimulation and awareness during orgasm. The sensation is distinct from regular ejaculation because you feel the fluid's journey through the urethral insert. Many folks report more intense, prolonged orgasms when wearing hollow plugs. The experience varies individually, but customer feedback consistently shows heightened climax intensity compared to unadorned orgasms.

What's the purpose of the ball stopper?

The ball stopper serves dual functions: safety and aesthetics. Functionally, it prevents the insert from sliding too deep into your urethra — it rests against your urethral opening when fully inserted, acting as a built-in safety limit. Aesthetically, it adorns the head of your penis with a decorative jewelry element, creating visual appeal during wear. Some folks appreciate the sensual adornment aspect as much as the internal stimulation.

How do I clean the hollow channel thoroughly?

Run hot water through the hollow channel immediately after use to flush out any residual fluids. Then wash the entire insert with antibacterial soap, paying attention to both ends of the channel. For thorough sanitization, boil the stainless steel insert for 10 minutes — this sterilizes both external surfaces and the internal channel. The boiling water circulates through the hollow center, ensuring complete hygiene. Let air dry completely before storage.

Can I wear this all day or just during sex?

Both options work — it depends on your comfort and goals. Some enthusiasts wear hollow urethral inserts for extended periods (hours) during daily activities, enjoying subtle constant stimulation and the psychological element of secret adornment. Others insert specifically for sexual encounters for heightened arousal and orgasm intensity. The lightweight 0.14 lbs and comfortable 2-inch length make extended wear feasible. We recommend starting with short wear periods (30-60 minutes) to gauge your body's response before attempting all-day wear.

Wearable urethral pleasure with hollow cum-thru design

Add the Chasm Stainless Steel Cum-Thru Urethral Insert to your cart for discreet California shipping, privacy-safe billing, and a mystery gift in every order.

Product Disclaimer: These products as with all products on this site are supplied AS IS. No warranty is given either implied or expressed. Products are intended as novelty only, and no representation is made or implied as to their suitability or safety for any particular use. Purchasers use the products entirely at their own risk. The manufacturer or TheDildoHub is not liable for any direct, indirect, incidental or consequential damage or loss howsoever arising caused by use or misuse of the products. This includes, but is not limited to, damage to the products and personal injury or damages due to use or misuse.

Shipping, Billing & Privacy

Name: Chasm Stainless Steel Cum-Thru Urethral Insert
SKU: AE846
Price: 45.05 USD
Availability: InStock

Last Updated: August 2026

Your privacy travels with every order

From the moment you check out to the moment your package arrives, every step is designed so that what you buy stays entirely between you and us.

How we appear on your statement

Credit / Debit Card: Sp-Tdh-Br
PayPal: TDH Retail Ltd

Some banks may display a slightly different or truncated version of these descriptors — this is determined by your financial institution and is outside our control.

What Discreet Shipping Means

Every package we send is prepared with your privacy in mind. If someone sees your order on your doorstep, in your mailroom, or being carried by you, they will have no way to know what’s inside. Even carrier employees handling your package cannot tell from the exterior that it contains intimate products.

Plain Packaging: Orders are shipped in standard brown cardboard boxes or plain poly mailers, with no decorative branding.
No Branding: No product names, logos, or “TheDildoHub” branding appear on the exterior of your package.
Carrier Markings Only: The only external markings are the shipping label and carrier tracking information required for delivery.

Plain cardboard shipping boxes used for discreet packaging

Our Shipping Boxes

We use cartons from Stock Box Company and other established packaging suppliers. The specific packaging used may vary depending on your order’s size, weight, fulfillment location, and availability. Using cartons from different suppliers does not change the discreet nature of your shipment.

All boxes used for shipping are plain, unbranded, and selected to provide appropriate protection during transit. The Stock Box Company cartons pictured above are single-wall boxes supplied from Santa Fe Springs, California. Their printed certification states that they meet the construction requirements of the applicable freight classification.

The certification shown on these cartons lists the following specifications:

Bursting-Test Rating: 200 pounds
Minimum Combined Facing Weight: 84 pounds per 1,000 square feet
Maximum Size Limit: 75 inches
Maximum Gross Weight Limit: 65 pounds

These specifications apply to the pictured Stock Box Company cartons. Other boxes may have different manufacturer specifications, but all packaging used for your order is selected for safe transit and maintains the same plain and discreet presentation.

For suitable smaller or lighter shipments, we may use padded poly mailers instead of cardboard boxes. These mailers are also plain and unbranded, with no externally visible product descriptions.

Free Shipping

Free Super Saver Shipping applies automatically to all U.S. orders over $139 — no promo code needed. Every free shipment receives the exact same discreet packaging treatment as any paid tier. Your privacy is never a function of how much you spend.

Order Processing

All orders take 1–2 business days to process before they ship. Orders placed with Express, Priority, or Rush shipping are processed on the next business day. Processing time is separate from transit time, and the delivery estimates for each shipping method begin once your order has been packed and handed to the carrier.

Orders placed on weekends and federal holidays begin processing on the next business day.

Processing Time: 1–2 business days for all orders. Express, Priority, and Rush orders are processed the next business day.
Tracking Updates: Tracking information may take 24–48 hours to update after your order ships. If it hasn't moved after 48 hours, contact us.

Shipping Rates

All rates are flat per order — not calculated by weight. The same price applies whether you're in Manhattan or rural Alaska. TheDildoHub covers any additional carrier costs; you will never be charged more than the rate shown at checkout.

Domestic Shipping — United States

All 50 states · APO/FPO/DPO · U.S. Territories · PO Boxes

Method	Transit Time	Price	Typical Carriers & Services
Super Saver (Free)	7–10 Business Days	Free (>$139)	USPS Ground Advantage, FedEx Ground Economy, UPS SurePost, OnTrac Ground
Economy	5–7 Business Days	$10.95	USPS Ground Advantage, FedEx Ground, FedEx Home Delivery, UPS Ground, OnTrac Standard
Express	4–5 Business Days	$24.95	USPS Priority Mail, FedEx Home Delivery, UPS Ground, OnTrac Express
Priority	3–4 Business Days	$34.95	USPS Priority Mail Express, FedEx Express Saver, FedEx 2Day, UPS 3 Day Select, UPS 2nd Day Air
Rush	1–2 Business Days	$64.95	USPS Priority Mail Express, FedEx 2Day, FedEx Overnight, UPS 2nd Day Air, UPS Next Day Air Saver

Transit times begin after your order ships — processing time is not included. Times are estimates; carrier delays, weather, and peak volumes can affect delivery. If significantly delayed, contact us and we'll make it right.

About our domestic carriers

We use USPS, FedEx, UPS, and OnTrac for reliable nationwide shipping. Our fulfillment team automatically selects the best carrier based on your location, speed, and package details. You cannot select a specific carrier, but every carrier delivers in plain, unmarked packaging.

FedEx: Ground Economy, Ground, Home Delivery, Express Saver, 2Day, Overnight
UPS: SurePost, Ground, 3 Day Select, 2nd Day Air, Next Day Air Saver
USPS: Ground Advantage, Priority Mail, Priority Mail Express
OnTrac: Ground, Standard, Express

Why is Super Saver slower than Economy?

Super Saver uses the most cost-efficient routing available at the time of fulfillment — typically consolidators or ground services with longer transit windows. Paid tiers use faster, dedicated carrier services. The same discreet packaging applies regardless of speed.

Military address shipping (APO/FPO/DPO)

TheDildoHub is proud to serve American servicemembers. All military shipments go exclusively via USPS as required by military postal regulations. Tracking is always available. Delivery may take additional time due to military postal routing, but every shipment leaves with the same discreet packaging standards.

PO Box delivery

Yes, we ship discreetly to PO Boxes across the nation via USPS. In our experience, PO Box deliveries may take a little longer — typically 1–2 additional days at most.

Delivery instructions

You can add delivery instructions at checkout. Please note that while we pass these on to the carrier, we cannot guarantee they will be followed in all cases. If delivery privacy is a concern, we recommend selecting a tracked speed so you can monitor arrival.

Why we don't guarantee delivery dates

No carrier can truly guarantee delivery in practice. Even express services are subject to delays from weather, carrier volume, and other factors outside our control. Stating estimates rather than guarantees avoids confusion. If your shipment is significantly delayed, we'll work with you to make it right.

International Shipping — Worldwide

Canada · UK · Australia · New Zealand · European Union & more

Method	Transit Time	Price	Typical Carriers & Services
International Saver+	10–15 Business Days	$34.95	USPS First-Class International, DHL eCommerce, FedEx International Economy
International Standard	7–12 Business Days	$44.95	USPS Priority Mail International, UPS Standard, FedEx International Economy
International Priority+	4–6 Business Days	$64.95	DHL Express, FedEx International Priority, UPS Worldwide Expedited, USPS Priority Mail Express International
International Rush	2–5 Business Days	$84.95	DHL Express, FedEx International Priority, UPS Worldwide Express

Transit times are estimates from date of dispatch and exclude processing time. Customs clearance may add additional days. If significantly delayed, contact us.

International carriers we use

Our global carriers include USPS, UPS, FedEx, and DHL depending on destination and tier. All international shipments receive the same discreet packaging as domestic orders.

International Saver+: USPS First-Class International, DHL eCommerce, FedEx International Economy
International Standard: USPS Priority Mail International, UPS Standard, FedEx International Economy
International Priority+: DHL Express, FedEx International Priority, UPS Worldwide Expedited, USPS Priority Mail Express International
International Rush: DHL Express, FedEx International Priority, UPS Worldwide Express

Countries we ship to

We ship to Canada, the United Kingdom, Australia, New Zealand, and EU countries including Germany, France, Netherlands, Spain, Italy, and more. For a complete list, see our International Shipping Policy.

Full international shipping policy

For complete details — including customs duties, delivery times, and all supported countries — please visit our International Shipping Policy.

Where We Ship From

We operate several fulfillment locations across California and one on the East Coast for specific items, positioned to reach you quickly wherever you are in the US. Our system automatically selects the best facility based on inventory and proximity to your address.

Huntington Beach, CA 92649
Van Nuys, CA 91406
Whittier, CA 90601
Hightstown, NJ 08520

We do not publicly list a specific street address, as we maintain a closed, business-to-customer operation rather than a public retail storefront.

After Your Order Ships

Once your order is on its way, keeping tabs on it is easy — and if anything goes wrong, we're here to sort it out.

Order Confirmation Email: Your shipping notification contains a tracking link. Click it to follow your package in real time via the carrier's site.
Shop App by Shopify: Download the free Shop app to track all your orders from one place. Available on iOS and Android.
Lost or Missing Packages: If your tracking shows delivered but nothing arrived — or your shipment appears stuck — contact us right away. In most cases, packages are misrouted and located within a few days. If confirmed lost, we reship at no additional cost to you.
International Customs & Duties: International orders may be subject to customs duties, import taxes, or brokerage fees imposed by your country. These are not included in your order total and are the recipient's responsibility. See our International Shipping Policy for details.

Our Guarantee — 100% Satisfaction

For health and safety reasons, we do not accept returns on any item, used or unused. That said, we stand fully behind every product we sell.

Many of our products are USB or battery-operated, and on occasion a unit may arrive defective or stop working as expected. Our support team will first walk you through basic troubleshooting — often the quickest path to getting things working. If troubleshooting doesn't resolve the issue, we provide a hassle-free replacement at no additional cost.

How to request a replacement

Contact our support team — available 7 days a week.
Share your order number and product name along with a brief description of the issue.
If the defect is visible, include a photo — this speeds up the process significantly.
Once validated, your replacement ships promptly in the same discreet packaging.

Need help?

We're here seven days a week. Questions about your order, a shipment, or anything else — our support team has you covered.

We take real pride in our customer experience team. We're here to listen when you need to be heard. No chatbots, no AI customer service — just 100% discreet email support from real people.

Email us · Contact page

Policies & Legal

Shipping Policy · International Shipping · Returns & Refunds · Privacy Policy · Terms of Service · Contact Information

Chasm Stainless Steel Cum-Thru Urethral Insert