Male Penis Exercise Vacuum Machine Masturbation Cup

Size S: Diameter   33mm

Size M: Diameter  38cm

Size L: Diameter   42mm

This vacuum cup for men mimics the shape of the glans and is comfortable to wear.

The Sex tools use ABS safety materials,

Automatic air shut-off, no air leakage, lift the valve to exhaust.

The silicone cover is soft and elastic.

The L Cup matches the large sleeve by default,

M，S Cup matches small size sleeve by default.

How to choose the cup:

Use a string around the thickest part of the glans when erecting, and then measure the length of the string.

The inner diameter of the large cup is 42mm (the circumference of the thickest part of the glans is more than 13cm)

The inner diameter of medium cup is 38 mm (the circumference of the thickest part of glans is 11.5-13 cm)

The inner diameter of small negative pressure cup is 33mm (below 11.5cm)