The American Standard Champion 4 Right Height One-Piece Elongated 1.6 GPF Toilet Tank is a high-efficiency toilet tank with a powerful, commercial grade flushing system. It features a 4" piston action accelerator flush valve and a 2-3/8" glazed trapway. This tank has a 16-1/2" rim height and 12" rough-in. It is made of vitreous china and has a white finish. The tank includes tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. This is an original equipment manufacturer replacement part for American Standard toilets.