Kingston Brass KB3549BL Vintage 4-Inch Centerset Lavatory Faucet and Brass Pop-Up, Brushed Nickel and Polished Brass Brass construction Stainless steel ball cartridge 4-Inch center set installation Max 1.2 GPM/4.5 LPM Water Flow Rate At 60 PSI (ASME standard) Compliant with California Energy Commission Title 20