This 1/2 in ceramic high-flow valve system works behind the scenes to get optimal performance out of your Kohler® faucet. It features solid brass construction for durability and reliability and ceramic disc valves that exceed industry longevity standards two times. Kohler®, P300-K-NA, Valve System, High-Flow, Series: P300-K, 1/2 in Inlet Connection, Deck Mounting, Solid Brass Body, 8 in W Dimensions