Conduit Reducing Washer; Trade Size 2-1/2 Inch x 1-1/4 Inch; Inner Diameter 1-11/16 Inch; Outer Diameter 3-1/4 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