Boners Penis PumpAlways dreamed of more volume? Then this penis pump is the perfect choice! The pump works by creating a vacuum in the shaft and expanding the blood vessels in the penis. Easy to use, Boners Penis Pump gives the penis more girth, and offers a great stimulation during use, which also makes the pump a suitable toy for masturbation as well. Use this pump together with a c ring for a longer and harder erection.