Dixon H33 Ductile Iron Series Q Pipe and Welding Fitting, Quick Release Coupling with EPDM Gasket, 3" Size x 3-1/2" Pipe OD Coupling for connecting two hoses in a straight run Connects to a pipe on both ends Zinc plated ductile iron for greater flexibility and elasticity and resistance to corrosion than unplated cast iron EPDM seal for resistance to weathering, ozone, UV, electricity, oils, water, steam and some solvents Steel safety clip and locking pin