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Specification:

Pump size:

x20 pump: 1.96inch*7.48inch (Suitable for penile erection length less than 15cm)

x30/max7 pump: 1.96inch*8.66inch (Suitable for penis erection length greater than 15cm and less than 18cm)

x40 pump: 2.56inch*9.84inch (Suitable for penis erection length greater than 18cm and less than 22cm)

There would be some difference as it was measured by hand

We recommend to use the upgraded version with the ball, which increases vacuum and comforsca

How the water pump works?

The water pump is an external penile rigidity device which uses vacuum technology to improve and maintain erection quality and duration through regular exercise of the penis.

The water pump functions by creating a vacuum seal against the pubic area of the user ,enclosing the flaccid penis.When the pump is pushed downwards against the body,the bellows compress and water is ejected from the end of the pump via the open valve.When released the bellows expand and the valve closes,creating a partial vavuum inside the pump.This causes the penis to expand and fill with blood,creating an erection.Re pumping increases the size of the erection.

Comparison of advantages of water pump and air pump:

The pressure created by the air is unstable and creates an uneven vacuum that can cause the penis to bend and bulge.
However the pressure created by the water is balanced and stable, and as the water drains, it creates an even vacuum around the penis and allows for expansion without damage such as bending and bulging.

X20, X30, X40 Pumps belong to water pumps.