Frostproof Enclosed Wall Hydrant Inlet Size 3/4 in FNPT Wall Thickness 8 in Recommended Wall Opening 5-1/2 in x 6-1/2 in Length 8 3/8 in Includes Vacuum Breaker and Key Handle Type Loose 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