Milwaukee Twins Chrome Diaphragm Type Straight Petcock Milwaukee Twins Petcock has a 1/4 vertical outlet and comes complete with a chrome 22mm nut and a nylon mesh filter screen. Accepts 1/4 fuel line and features on, off, and reserve functions. Features: Vertical outlet Reserve setting Comes complete with a chromed 13/16 / 22mm nut and nylon mesh filter screen Chrome finish Accepts 1/4 fuel line Replaces OEM 62129-75T