Robroy Stainless Couplings are designed to withstand harsh corrosive environments and connect threaded stainless steel conduit, nipples or elbows. Traditional couplings are available in 304 or 316 stainless steel. Robroy Stainless Hygienic Couplings are 316 stainless steel and feature a circular conduit entry gasket made of FDA compliant silicone designed to protect from ingress. Robroy Stainless Three Piece Couplings connect two pieces of stainless steel conduit when once piece of conduit cannot be turned. Three piece couplings are available in 316 stainless steel.