"Lust Buster Vacuum Pump with 7.5"" Cylinder (2AA).The Lust Buster Vibrating Vacuum Pump has a 7.5"" cylinder and a multi-speed vibrating bullet. The advanced pump action rubber bulb enables you to create a vacuum and it has an easy to use pressure release valve. Along the cylinder there is a measuring scale to monitor the enlargement of the penis and at the base a rubber sleeve for air tight suction."