KOHLER K-300-K-NA 1/2-Inch Ceramic High-Flow Valve System n/a Imported KOHLER plumbing products mean beautiful form as much as reliable function Solid brass construction for durability and reliability KOHLER ceramic disc valves exceed industry longevity standards two times for a lifetime of durable performance Bath- or deck-mount 15.0 to 17.0 gpm (gallons per minute) flow rate.