A type no hub coupling 1.DIA 1.5", 2", 3", 4", 5", 6 ... Steel & Neoprene 3.Non Slot Hex Screw A type no hub couplingDiameter (inch) Diameter(mm)Carton sizePieces/ carton1.5'' 4034 ... prevents corrosion and pipe separation or deflection.Features:1.No-Hub Coupling2.Non slot hex-head screw3.Leak ProofSpecificationsMaterialNeoprene Gasket ... Bands2Working Temperature-30oc to 140 oc A type no hub coupling