Kohler GP77006-rp Ceramic Valve, One Size, Rough Plate Protect the warranty on KOHLER products, always look for the KOHLER GENUINE PARTS logo 1/4" turn ceramic valve, counter clockwise close Ceramic disc ensures durability and long-lasting performance For most KOHLER two handle faucets from 1990 to 2010 Valves need to be replaced with the same valve, cannot upgrade to Ultraglide