2-1/8 42 CU Inch Steel Outlet Box Extension Ring

Square Box Extension Ring; Brand Name Steel City; Type Outlet Box Extension Ring; Height 4-11/16 Inch; Width 4-11/16 Inch; Depth 2-1/8 Inch; Capacity 42 CU Inch; Number of Knockouts 4; Knockout Size (2) 1/2 Inch, (1) 3/4 Inch Conduit Sides, (2) 1/2 Inch, (1) 1/4 Inch Conduit End; Material Pre Galvanized Steel; Standard Package 20 Per Carton; Approval UL