This manually operated penis pump has an ergonomic handle to make the vacuum stronger and build up the pressure, and a special valve for instant pressure release. With a soft entrance sleeve and measures on the outside of the transparent cylinder. The amount of pressure in the pump can be seen on the pressure meter. The Red Line Pump is made of TPE, ABS and PVC. A penis pump helps improve the erection and performance. The vacuum also helps to get and maintain an erection in case of erectile dysfunction.