Wall Hydrant, Inlet Size 3/4 in FNPT, Wall Thickness 12 in, Recommended Wall Opening 2 in x 3-7/8 in, Length 16 in, Includes Key, Vacuum Breaker, Handle Type Key, Casing Material Polished Brass, Outlet Size 3/4 in Hose, Max. Pressure 125 psi, Max. Temp. 120 Degrees F, Standards ASSE, GOVERNMENT SPEC WW-P-541b, IAPMO