I bought another vacuum pump that has a 28 centimeter (11 inch) length and a 5.72 centimeter radius (2.25 inch) or 8 inch circumference. This pump base is slightly angled to better handle a curved erection like mine. Iβm still only getting the length out to 20 centimeters before my penis gets cramped in the tube because of the angle but itβs almost completely filling the girth. Iβve read that it takes time and patience to get the ligaments at the base of my penis to stretch so that my erection will be straighter, but I guess we will see. In the meantime Iβm having some fun with it.