This comfortable cocksling is made from an exclusive Silicone/TRP hybrid. Make it intentionally uncomfortable by adding electricity. Two separate adjustable electrical contacts are provided, one under each ball. These contacts are machined from solid aircraft aluminum, not thin copper film or mesh. The contacts accept 4mm banana plug, or an adapter for 2mm pin plug. (Cords and stim unit not included.)Measurements: cock and ball hole diameter is 1.75 in. Cock hole diameter is 1 in. Ball hole diameter is 0.75 in. Total length is 5 in.