Masterjack Double Penetration JO Ice Masturbator

The Masterjack Double Penetration JO Ice Masturbator is a dual-chamber stroker crafted from OxBalls' Plus+SILICONE blend, featuring two distinct internal textures in one ergonomic toy. Each chamber delivers different sensations—tight grip in one, looser stimulation in the other—so you explore varied intensity without switching devices. The diamond plate grips keep your control secure throughout extended sessions.

About this product

The Masterjack Double Penetration JO Ice Masturbator is a purpose-built stroker with two separate internal chambers, each engineered with different textures to deliver distinct sensations. OxBalls designed this toy around the idea that realistic feel matters—the Plus+SILICONE blend responds to your body heat, warming instantly to create a genuinely lifelike experience. Unlike basic single-opening strokers or cheaper TPE alternatives, this material holds its shape, resists degradation, and delivers consistent performance over time. The dual-chamber approach lets you switch between a tighter, more constrained grip in one opening and a less restrictive sensation in the other, all within seconds.

What separates the Masterjack from standard strokers is the precision engineering behind those two chambers. Each one has been textured distinctly, so the difference is real and noticeable rather than marketing fiction. The ergonomic design includes industrial-strength diamond plate grips that keep you in control during longer sessions without slipping. Compared to textured strokers that rely on a single internal pattern, the dual design here gives you genuine adaptability—you're not locked into one type of sensation.

Main features

• Two distinct chambers: Each opening delivers a completely different texture and grip intensity, letting you alternate between tight constriction and looser stimulation within the same toy.
• Plus+SILICONE material: Warms to skin temperature instantly and feels remarkably lifelike compared to standard TPE, with superior durability and colour retention.
• Diamond plate grip: Industrial-textured handle surface ensures secure, confident control throughout extended sessions without hand fatigue or slipping.
• Waterproof construction: Fully submersible design means you can use it in the shower or bath, and cleaning is straightforward with warm water and soap.
• Adjustable internal diameter: Ranges from 1 to 2.5 inches, adapting to your body rather than forcing you to fit a one-size-fits-all design.

Measurements and materials

• Length overall: 5.5 inches from tip to base; internal shaft depth of 5 inches accommodates most body sizes
• Width: 3 inches across the body at its widest point for comfortable handling
• Internal diameter: Adjustable range of 1 to 2.5 inches, so tightness adapts to your preference
• Weight: 8 ounces—substantial enough to feel solid during use without becoming cumbersome
• Material: OxBalls' proprietary Plus+SILICONE blend; non-porous, body-safe, and hypoallergenic
• Closure: Open-ended design; no batteries, charging port, or electronic components required
• Box contents: The stroker itself; cleaning instructions; discreet packaging

Charging, settings and first use

The Masterjack requires no charging, battery, or setup—it's ready to use straight from the box. Rinse it under warm water before first use, then apply a water-based lubricant generously to both internal chambers. Start with the chamber that appeals to you first; most people begin with the tighter opening to feel the grip intensity, then transition to the second chamber to experience the textural difference. The adjustable internal diameter means you can increase or decrease tightness by how firmly you grip the exterior body during use.

During your first session, take time to explore both chambers slowly so you understand how each one feels at different stroke speeds and grip pressures. The Plus+SILICONE will warm to your body temperature within the first minute, which changes the sensation noticeably—it becomes softer and more responsive. Clean it immediately after use with warm water and mild soap, then pat dry and store in a cool, dark place. Unlike rotating male strokers that require batteries and maintenance schedules, this toy is maintenance-light and durable.

Is this the one for you?

Care and storage

Clean the stroker immediately after use by running warm water through both chambers and over the exterior, using your fingers or a soft brush to remove any lubricant residue. A mild, fragrance-free soap works well; avoid harsh detergents or alcohol-based cleaners that can degrade the Plus+SILICONE. Pat it dry completely with a clean towel, then store it in a cool, dark place away from direct sunlight and heat sources. Keep it away from sharp objects and store separately from other toys to prevent material contact damage.

More on the subject

Stroker selection depends on what sensation matters most to you—texture, intensity, material quality, and how you want to alternate between different experiences. Read more about what works best for different preferences on Male Masturbators, where you'll find insights into material choice, session length, and maintenance across the full range of stroker styles.

What to expect

First-time users are often surprised by how different the two chambers actually feel in practice. The first opening typically delivers noticeably tighter grip and more constrictive sensation, while the second chamber offers looser, less restrictive stimulation. Most people find themselves alternating between the two depending on what they want that session, rather than settling into one favourite. The transition between chambers takes only seconds, so variety doesn't require stopping or resetting.

The Plus+SILICONE material warms rapidly to body temperature—usually within the first minute of use. This warmth transforms the sensation significantly, making the stroker feel softer and more responsive than it does when cold. That realistic warmth is what distinguishes this material from standard TPE, which remains cooler and less lifelike. The difference is immediately noticeable and consistently mentioned as a key appeal of OxBalls' construction.

Grip security matters during longer sessions, and the diamond plate surface keeps your hand firmly in control without slipping even when wet or lubricated. The 8-ounce weight feels substantial without becoming fatiguing—it's present enough to anchor your hand position confidently. Cleaning is straightforward: warm water and mild soap, then air dry. There are no crevices, motors, or sealed seams that trap moisture or debris, so maintenance stays simple and reliable.

Most users report sustained performance over extended use without noticeable degradation of material or texture. The Plus+SILICONE resists discolouration, odour absorption, and the softening that affects cheaper alternatives. If you're accustomed to basic strokers, the quality difference in how this toy feels and performs becomes apparent within the first session.

How it compares

Why choose this one

Browse the full Masterjack Double Penetration JO Ice Masturbator range and order it from Malechastity.com.au with discreet Australia-wide delivery. This stroker gives you two genuinely different sensations, realistic Plus+SILICONE material that warms to your body, and a grip design that keeps you in control throughout extended sessions. No batteries, no complexity—just straightforward, well-made sensation that performs consistently. Invest in quality that lasts. Service That Keeps Customers Coming Back.