This KOHLER® ceramic wall-mount two-handle valve system works behind the scenes to deliver optimal water performance through your faucet. A quarter-turn rotation allows you to turn the water on and off with small movements, creating an ergonomic faucet. The valve features brass construction for durability and ceramic valving to keep your water running smoothly for years. Kohler® Widespread In-Wall Valve System, 1/2 in Inlet Connection, 45 psi, 8.4 gpm, For Use with: 8 in Center 2-Handle Wall Mount Faucets, Wall Mount, Brass Body, 2-1/4 in L x 8 in W