Get your blood pumping especially to your ram rod! With the You2Toys Mega Men Automatic Pump. Just insert your manhood into the transparent-blue cylinder and push the button to create a vacuum, this improves blood circulation, causing the penis to become firm and hard. Mega Man Penis Pump has an outlet valve. Phthalates free. Batteries not included. Tube size: approx. 23 cm, Penetration Depth: 22 cm, Diameter of cylinder: 3.5-7.5 cm. ABS (cylinder and controlling unit), silicone (sleeve).