Steel City 21 cu in Square Steel Outlet Box Silver

The Steel City 52151 CV 1/2 3/4 is a pre-galvanized steel square box with an CV- bracket and 1/2 inch and 3/4 inch eccentric knockouts. Is a 4 inch box that is 1-1/2 inch deep with a 21-Cubic Inch capacity and is intended for use with non-metallic sheathed cable. On each side and on both ends of the box there are two 1/2 inch knockouts and one 1/2 inch and 3/4 inch eccentric knockout. The knockouts provide better contact with the conduit fitting and locknut to the box while improving the grounding path. The bottom of the box contains three 1/2 inch knockout and two 1/2 inch and 3/4 inch eccentric knockouts.