Doc Johnson, supplying sextoys to Hollywood and beyond for over thirty years, has come up with another winning product - the Mighty Man Pump. With a seven and a half inch clear chamber for you to watch the effects, this pump features an easy to use "clench and pump" style handgrip which makes it much easier to create strong vacuums. Although there is a push button vacuum release valve for safety, we recommend starting slowly with this pump and building up gradually to extended use, as the vacuum can be very powerful.