1 3

Master Series Inertia Flexible Cum-Thru Penis Plug

$199.99
$199.99

Flexible silicone penis plug with hollow cum-thru design. Interchangeable rings for customizable fit and stainless steel components.

Key Features:

Hollow cum-thru design maintains stimulation during extended sessions

Medical-grade silicone shaft flexes naturally with body movement

Two interchangeable head rings for customizable fit options

Comfortable extended wear without rigid plug discomfort

Stainless steel components add premium weight and durability

Vendor: XR Brands
SKU: NEW-2003
Availability: Out Of Stock
Product type: Penis Plugs
Please hurry! Only 0 left in stock

The Master Series Inertia Flexible Cum-Thru Penis Plug from XR Brands is a premium silicone and stainless steel intimate accessory designed for heightened internal stimulation and extended wear. Its hollow shaft and interchangeable head rings deliver customizable comfort while the flexible construction adapts naturally to your body. The medical-grade materials ensure safety and durability for consistent, intense sensations.

Master Series Inertia Flexible Cum-Thru Penis Plug Specifications

  • Brand: XR Brands
  • Material: Medical-grade silicone shaft with stainless steel components
  • Total Length: 4.2 inches
  • Insertable Length: 3.75 inches
  • Diameter: 0.3 inches
  • Interchangeable Rings: 1.2 inches and 1 inch diameter
  • Key Feature: Hollow cum-thru design with flexible construction
  • Ideal For: Men seeking customizable internal stimulation with extended wear comfort

Why Choose the Master Series Inertia Flexible Cum-Thru Penis Plug

  1. Flexible Silicone Design: The soft medical-grade silicone shaft bends and moves naturally with your body, providing comfort during extended wear while maintaining its shape and function perfectly.
  2. Interchangeable Head Rings: Switch between the larger 1.2-inch and smaller 1-inch rings to dial in exactly the fit and sensation you want, giving you total control over your experience.
  3. Hollow Cum-Thru Construction: The innovative hollow design allows uninterrupted sensations while maintaining stimulation, making it ideal for long sessions and different types of play.

How the Master Series Inertia Flexible Cum-Thru Penis Plug Works

The Master Series Inertia delivers sensations through its precisely engineered hollow silicone shaft that sits inside, creating constant contact and internal pressure. The stainless steel components add weight and firmness, contrasting with the flexible silicone for a gripping sensation that builds intensity. If you want to explore different styles, check out our range of silicone penis plugs to compare options.

What sets the Inertia apart is the flexibility factor. Unlike rigid alternatives, this one moves with you during extended wear, meaning comfort doesn't drop off after an hour or two. The hollow design keeps sensations alive throughout, and those interchangeable rings let you adjust the fit without needing a completely different device.

Master Series Inertia Flexible Cum-Thru Penis Plug Features

  • Medical-Grade Silicone Shaft: Soft, body-safe material that flexes naturally while maintaining structural integrity for consistent stimulation.
  • Stainless Steel Components: Premium metal elements provide durability, added weight, and an intense contrast against the soft silicone.
  • Two Interchangeable Head Rings: Customize your fit instantly with 1.2-inch or 1-inch diameter rings for personalized comfort and security.
  • 0.9-Inch Ring Arm: Engineered for optimal positioning and stability, keeping everything exactly where you want it during wear.
  • Easy Cleaning: Seamless silicone and steel construction means no crevices or hidden spots—clean thoroughly in seconds with soap and warm water.

Penis Plug Styles Comparison

Style Best For What Makes It Different
Master Series Inertia (Flexible) Extended wear and comfort seekers Flexible silicone adapts to your body while hollow design maintains continuous stimulation and sensation throughout longer sessions.
Rigid Silicone Plugs Men wanting maximum firmness Solid construction delivers constant pressure without any give, ideal for intensity-focused experiences and shorter wear periods.
Stainless Steel Plugs Those seeking weight and temperature play Premium metal provides significant heft and conducts temperature beautifully for advanced sensory exploration.

Who the Master Series Inertia Flexible Cum-Thru Penis Plug Is For

Men Seeking Extended Wear Comfort: If you want to keep sensations going for hours without discomfort building up, the flexible construction on this one changes everything. The silicone gives where rigid plugs dig in, while still delivering serious internal stimulation. Pair it with our silicone cock rings to amplify your experience even further.

Guys Who Want Customization: Those interchangeable rings mean you're not locked into one fit. You control the sensation level and how snug everything sits, making this ideal for blokes who want a device that truly adapts to them rather than forcing themselves into a one-size-fits-all situation.

Why the Master Series Inertia Delivers

This plug stands out because it refuses to compromise between comfort and intensity. The flexible silicone keeps you comfortable for marathon sessions while the hollow design ensures sensations don't fade after the first hour. The stainless steel weight adds a premium feel that cheap alternatives simply can't match, and those interchangeable rings mean you're not buying multiple plugs—one device, infinite configurations. Once you feel the contrast between the soft silicone and firm steel components, you'll understand why this is worth the investment.

From the Community

Real experience:

I started with rigid plugs and they felt intense for maybe an hour before discomfort set in. The moment I tried the Inertia, the difference was obvious. The flexible shaft bends naturally instead of fighting my body, and after four hours of wear, comfort was still solid. The hollow design kept sensations alive the entire time—no dead zones.

Switching between the two ring sizes let me dial in exactly what I wanted depending on the day. Sometimes I wanted that tighter squeeze from the smaller ring, other times the larger one gave me breathing room. The stainless steel weight adds this premium psychological element too—you definitely feel like you're wearing something engineered specifically for pleasure.

Explore More

The Master Series Inertia is part of our wider range of premium penis plugs and intimate accessories. Discover more options in the flexible penis plugs collection to find exactly what you are looking for.

Get the Master Series Inertia Flexible Cum-Thru Penis Plug

Ready to experience heightened internal sensations with a device designed for comfort and customization? Order the Master Series Inertia from MaleChastity.com.au today with discreet shipping Australia-wide and start exploring new dimensions of pleasure.

Malechastity.com.au ships with Australia Post. We ship from Sydney.

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 1-6 business days after shipping, but may subject to any postage carrier related delays beyond our control.

Free standard shipping on orders shipped within Australia above $200. For orders below $200 standard shipping within Australia is $12.95 and will be added at checkout.

Orders addressed to P.O box, G.P.O box or Parcel Collect will be handled by Australia Post. Extra time should be allocated for these orders.

Shipping Transit Times (Including Free Shipping)

Shipping time refers to the estimated time that it will take to deliver your order after it’s ready to ship (Please note this does not include time to process your order). Shipping time does not commence after your order is put through but begins the moment your order has been processed and is ready to dispatch via the our freight carrier..

1. Major City & Metro Areas (within Australia)

All in stock orders are generally processed on the same day the order was placed on business days for orders received before 12pm. Generally, orders are processed and shipped the same day or next business day.

Orders are typically received 1-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the nearest depot location.

2. Rural Areas (within Australia)

All orders are generally processed on the same day the order was placed on business days before 12pm.

Generally, orders are processed and shipped the same day or next Business day.

Packages below 2kg are usually received 3-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the local Australia Post depot.

International Shipping

The price for international shipping is AU$12.95 for orders equal to or below 0.399kg (399grams), and AU$22.95 for orders with a total weight equal to or above 0.4kg (400 grams).

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 6-30 business days after shipping. 

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from your nearest delivery depot.

Please note in regards to all orders

– These expected delivery dates/times are based on carrier shipping practices, your destination, and the items in your order.
– Expected delivery dates are estimates. Orders can be delayed due to fraud verification or the time of the order being placed. Items that are not regularly stocked cannot be held to the expected delivery dates.
– Orders may be delivered in separate shipments.
– The order cut off times are based on normal Business Hours and exclude weekends and Holidays: Monday – Friday 12 pm
– When your order ships you will receive an email from us with a link to track your order.  If you receive your tracking number before 6 pm (AEST) it may not be updated on the Carrier’s website until that evening.

Due to large amounts of online credit card fraud, all orders are subject to approval by our payment verification department. We will notify you by phone or email should your order be delayed.

We have a 14 day return policy, which means you have 14 days after receiving your item to request a refund for any defective products.

Returns and exchanges are only available for faulty items, goods not as described, or in some instances, for incorrect sizing.

Due to health and safety regulations, Maleshastity.com.au cannot resell any returned or exchanged products.

This policy is in place to prioritise your well-being and ensure that you receive the highest standard of hygiene and quality in all products.

To be eligible for a refund, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.

You’ll also need the receipt or proof of purchase. We do not issue refunds for change of mind or incorrect choice.

Under Australian Consumer Law, we are not obliged to accept returns for “incorrect choice” or “change of mind” so please choose your products carefully. 

Any freight and insurance costs to return the item to us are at your expense. This includes the liability for any lost freight – send via registered post.
If your return request is accepted, we will provide you with all instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items

We do not accept returns for any products that have change of mind, damaged products, or for products that have been used or do not have their original packaging.

Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 7 business days.

Please remember it can take some time for your bank or credit card company to process and post the refund too.

Frequently Asked Questions

What is the Master Series Inertia Flexible Cum Thru Penis Plug and what type of intimate accessory is it?
A premium penis plug combining medical-grade silicone with stainless steel components, the Master Series Inertia delivers customizable internal stimulation through its hollow cum-thru design and flexible construction that adapts naturally to your body for extended wear comfort.
Does the Master Series Inertia Flexible Cum Thru Penis Plug allow for comfortable extended wear sessions?
Flexible silicone construction means the Master Series Inertia bends and moves naturally with your body during marathon sessions, preventing the discomfort that rigid alternatives cause after an hour while maintaining consistent internal pressure and stimulation throughout.
Are there interchangeable components included with the Master Series Inertia Flexible Cum Thru Penis Plug for customization?
Two head rings come included - a larger 1.2-inch and smaller 1-inch diameter option - letting you switch between different fits and sensation levels instantly without needing multiple plugs to dial in exactly the comfort and tightness you want.
Which men are best suited for the Master Series Inertia Flexible Cum Thru Penis Plug during intimate sessions?
Guys seeking extended wear comfort without sacrificing intensity, blokes who want customizable fit options, those frustrated with rigid plugs that dig in after an hour, and anyone wanting premium materials that move naturally with their body.
Can you buy the Master Series Inertia Flexible Cum Thru Penis Plug with discreet shipping across Australia?
Australian customers can order the Master Series Inertia directly from MaleChastity.com.au with completely discreet packaging and Australia-wide shipping, ensuring your premium silicone and stainless steel plug arrives privately without revealing the contents to anyone.

Related Products

Recently Viewed

Why Shop With Male Chastity Australia?

FAST ORDER DISPATCH

We ship same day on all in-stock orders placed before 12pm! Free shipping on all orders above $200.

DISCREET PACKAGING

All of our shipments come in discreet packaging ensuring those nosy neighbours will never know!

INTERNATIONAL SHIPPING

We ship our full range of products worldwide with fast dispatch for orders before 12pm Sydney EST!