Description for a complete two-piece toilet: American Standard Evolution 2 Round Front Flowise 1.28 gpf Toilet, bone 2752.128.021. The American Standard Evolution 2 toilet is a two-piece toilet constructed of vitreous china, a type of ceramic fired at high temperature to form a non-porous body coated with a ceramic glaze which is fused to the body, features a 2-Inch flapper flush valve. It has a 12-Inch rough-in, comes complete with coupling components and tank trim, including a color-matched trip lever. Featuring a round front siphon action jetted bowl, with a generous 9-by-8-Inch water surface area, it comes with two color-matched bolt caps. It has a fully glazed 2" tramway and pilot valve water control. Toilet seat sold separately. About American Standard Brands Great performance and great looks meet in our complete line of fixtures and faucets for bath and kitchen. Performance and reliability. Coordinated collections. Ingenious features. American Standard is Style that Works Better everyday.