Size Matters Bionic Electric Pump with Cylinder is a handy toy produced by Size Matters. Ideal for men, it can be used to enhance your erections while delaying ejaculation. This toy comes with a brass-pressure valve that will allow you to fiddle with the intensity of the suction. Best of all, it is shaped to provide a continuous flow of pressure. While it is fully electric, this pump can also be used manually. It is made from body-safe materials and is easy to clean.