Train your way to a longer, stronger performance with the 4M Endurance Penis Pumping Set. Get results you can see and feel with the 4M Penis Pump Set, a deluxe vacuum pump and cylinder designed to make pumping your way to bigger penis easy, safe, and effective. Item Dimensions: Cylinder Width: 1.75 in. (4.45 cm) Cylinder Height: 9 in. (22.86 cm) Cylinder Depth: 1.75 in. (4.45 cm)