Rough Brass and Rough Polished Chrome,Meet ANSI A112.1.1 and ASSE 1001 standards; CSA B64.1.1 Certified; IAPMO Listed.,Atmospheric-Type Vacuum Breakers,Prevent back-siphoning of polluted water into potable water systems. Corrosion-resistant forged-brass construction. FNPT connection.Specifications :Max. Pressure: 125 psiTemp. Range: 212 Degrees FHeight: 2 5/16 inWidth: 21/32 inStandards: ASSE 1001WARNING: California ResidentsThis product and/or packaging can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm.