The Penis Enlarger Pump is a great beginner pump or masturbation tool. Each pump has a see thru pump to watch the action, a soft jelly ring that keeps air from getting inside the pump and uses a pneumatic pump to product suction. When you are done pumping, the pump has a pressure release valve to stop the suction.
Specs:
Length: 7.5 Inches
Width: 2 Inches
Circumference: 7.25 Inches