Through Wall/Floor Sealing Assembly, Constructional Feature Watertight, Trade Size 3-1/2 Inch (Conduit/Steel Pipe), 3 Inch (Cast Iron Pipe), Wall Thickness 4-5/8 to 14 Inch, Outer Diameter 4 Inch (Conduit/Steel Pipe), 3.96 Inch (Cast Iron Pipe), Material Hot Dip Galvanized Alkyd Enamel Coated Malleable/Ductile Iron, Number of Clamp Screw 4