Thru wall and Floor Sealing Assembly and Fitting, Constructional Feature Watertight, Corrosion Resistant, Trade Size 2 Inch (Conduit/Steel Pipe/Cast Iron Pipe), 2-1/4 Inch (Copper Tube), Outer Diameter 2.375 Inch (Conduit/Steel Pipe/Copper Tube), 2.5 Inch (Cast Iron Pipe), Wall Thickness 8-3/8 to 16 Inch, Material Epoxy Zinc Coated Malleable/Ductile Iron (Body), PVC Coated Steel (Pressure Ring), Neoprene (Grommet), Number of Clamp Screw 3