Dielectric Union Steel Zinc-Plated Galvanized Steel Black 1 1/4 in Female NPT 1 1/4 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 3/4 in Overall Length