Use these dielectric nipples for water heater inlet and outlet hook-ups and other uses where dissimilar metals occur in piping and plumbing systems. Thermoplastic lining prevents corrosion. Measurements are 3/4 in. NPT x 3/4 in. NPT x 2-1/2 in. of length. Prevents corrosion between 2 dissimilar metals Sturdy long-lasting construction Install in either direction Metal and plastic construction Dimensions Product Depth (in.) 0.94 Product Height (in.) 2.63 Product Width (in.) 1.06 Details Finish Family Silver Metallic Material Metal,Plastic Pack Size 1 Product Type Dielectric Fitting Product Weight (lb.) 0.422