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