Size Matters Clear Acrylic Penis Pump Cylinder – 2.25 x 9 Inch

This Size Matters Clear Acrylic penis pump cylinder is the largest of the brand's three diameters: 2.25 inches across and 9 inches long. It is a replacement or upgrade cylinder rather than a full pump, made from thick, crystal-clear acrylic with a built-in air valve. Size Matters recommends this size for men who are above average in girth and find the standard 2-inch cylinder too snug.

Choosing the right penis pump cylinder

Size Matters makes this cylinder in 1.75, 2 and 2.25-inch diameters, all 9 inches long. Most men use the 2-inch, and the brand suggests 1.75 inches for those on the smaller side. The 2.25-inch is for those above average. Picking correctly matters: too narrow and the cylinder pinches or will not fit comfortably; too wide and it is harder to get a good seal at the base. Measure your girth when fully erect, divide by 3.14 for diameter, and choose a cylinder with a little room to spare. If your diameter is close to 2 inches, the 2-inch cylinder is probably the better match.

Acrylic, taper and valve

Each cylinder is hand crafted from industrial-strength clear acrylic, so it holds its shape under vacuum and you can see clearly what is happening as you pump. It tapers toward the top to follow the shape of the penis, which Size Matters says makes it more comfortable to wear. A built-in air valve lets you disconnect the pump while keeping the pressure inside the cylinder. That means you can set the hose aside without losing the vacuum, and release the valve when you are ready to let the pressure out. No gasket is needed, though a little water-based lube around the base of the shaft and on the opening helps form an airtight seal against the skin.

Using a cylinder safely

Trim or tidy pubic hair at the base for a better seal. Lube the opening, place the cylinder flat against the body and pump slowly. Light pressure is enough at first; build up over several sessions rather than in one go. Keep sessions short, release the valve straight away if you feel pain, numbness or coldness, and never fall asleep with a pump on.

What you need with it

This listing is a single cylinder only. You will need a compatible hand pump or bulb to connect to the air valve; check that your pump's hose fits before buying.

Care

Wash the cylinder with warm water and mild soap after each use, rinse well and dry it fully. Avoid alcohol-based cleaners and harsh chemicals, which can cloud acrylic.

Specifications

• Brand: Size Matters, Clear Acrylic Penis Pump Cylinder
• Diameter: 2.25 inches (also made in 1.75 and 2 inches)
• Length: 9 inches
• Material: clear acrylic
• Features: tapered top, built-in air valve, no gasket required
• Sold as: single cylinder, pump not included
• Colour: clear

Browse more from Size Matters, see all penis pumps, or read our guide to male sex toys.