Through Wall Sealing Assembly, Constructional Feature Watertight, Trade Size 1-1/4 Inch (Conduit/Steel Pipe), 1-1/2 Inch (Copper Tube), Wall Thickness 8-3/8 to 16 Inch, Outer Diameter 1.600 Inch (Conduit/Steel Pipe), 1.625 Inch (Copper Tube), Material Epoxy Zinc Coated Malleable/Ductile Iron (Body), PVC Coated Steel (Pressure Ring), Neoprene (Grommet), Number of Clamp Screw 3