Conduit Sealing Bushing, Conduit Size 3 Inch, Wire Size (1) 2.28 Inch/(2) 1.21 Inch/(3) 1.16 Inch/(4) 0.97 Inch, Diameter 4 Inch, Height 1-1/2 Inch, Material Hot Dip Galvanized Malleable/Ductile Iron (Locking Collar), Canvas Bakelite (Sealing Disc), Approval CSA, Application Damp/Corrosive/Hot/Cold Air/Dust Atmosphere