Dielectric Union Malleable Iron Zinc-Plated Galvanized Malleable Iron Zinc-Plated Galvanized 2 in Female NPT 2 in Female NPT Insulator Material Polysulfone Gasket Material Buna-N Nut Material Zinc-Plated Galvanized Malleable Iron 250 psi Maximum Operating Pressure 33 Degrees to 180 Degrees F 3 1/8 in Overall Length