This Xtender Glow in the Dark Penis Pump is the ideal way of having a little extra fun in the dark. Quick and easy to use, the Xtender Glow in the Dark Penis Pump from Nasstoys will help you to get bigger, harder erections and longer lasting erections with continued use. The Penis Pump features a soft vacuum seal around the base of the cylinder and quick release pressure valve in the flexible hose. Simply squeeze the bulb to increase the vacuum within the chamber and with regular use should help to improve the size of your manhood.