Dielectric Union, Pipe Fitting Material Galvanized Steel, Malleable Iron, Fitting Connection Type FIP x FIP, Pipe Size - Pipe Fitting 3/4 in, Max. Pressure 250 psi, Max. Temp. 180 Degrees F, Gasket Material Buna-N, Nut Material Steel, Insulator Material Polysulfone, Hex Size 1 7/8 in, Standards ANSI B16.39; Federal Specifications for Tensile Strength and Thread End Connections