1.28 GPF, MetroFlush Piston Operated Exposed Closet Flush Valve, For Water Closets, Exposed, Quiet Type, Chrome Plated Flushometer Valve With Polished Exterior, Chloramine Resistant Piston With A Clog Resistant, Filtered By-Pass, ADA Compliant With A Non-Hold Open & No Leak Handle Feature, High Back Pressure Vacuum Breaker, 1 Piece Hex Coupling Nut, Adjustable Tailpiece, Spud Coupling & Flange For Top Spud Connection, Control Stop Has Internal Siphon-Guard Protection, Sweat Solder Kit, & A Cast Wall Flange With Set Screw, Internal Seals Are Made Of Chloramine Resistant Materials.