Kingston Brass KB6158ALL Legacy 4-Inch Centerset Lavatory Faucet with Acrylic Handle Brass Pop-Up, Brushed Nickel Brass construction Duraseal washerless 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