Conduit Reducing Washer; Trade Size 3 Inch x 2 Inch; Inner Diameter 2-1/2 Inch; Outer Diameter 4-1/2 Inch; Conduit Type Rigid, IMC; Material Steel; Finish Galvanized; Approval UL 514B, CSA; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1