KOHLER K-303-K-NA 1/2-Inch Ceramic Wall-Mount Three-Handle Valve System
This ceramic wall-mount 3-handle valve system works behind the scenes to get optimal performance out of your KOHLER faucet.  It features an integral diverter mechanism, solid brass construction for durability and reliability and one-piece ceramic valves resistant to debris and hard water buildup.  Ergonomic handle rotation provides on/off water control with only a quarter turn.