ELEC COVER #201 4"X4", EXTENSION RING, 1-1/2" DEEP, 1/2" KO's

Electrical Outlet Box Extension Ring; Type Square; Height 4 Inch; Width 4 Inch; Depth 1-1/2 Inch; Capacity 22.5 Cubic Inch; Number of Knockouts 12; Knockout Size 1/2 Inch; Material 1/16 Inch Thickness Pre-Galvanized Steel; Standard Package 50; Approval UL