Replacement Brass Ceramic stem Disc cartridge Faucet Valve Quarter turn PAIR 1/2" fits PAINI (52mm short stem) 1/2" ceramic valve to fit PAINI ASME A112.18.1UPC ANSI NSF61 (short stem 52mm) Can't find the right size? Contact us for advice - We are available for Technical help and support. You will receive one PAIR of valves (one Anticlockwise and one clockwise opening) SOLID BRASS M4 screw provided and Clear installation instructions included **please check the dimensions of the valve, long stem 55mm valve also available see other items**