Thomas & Betts 531511/23/4 Steel City Extension Ring

Steel City Extension Ring, 1-Outlet, 1/2 in, 3/4 in Knockout, 4 in Length, 4 in Width, 1-1/2 in D, Squared, Knockout Cable Entry Size, 21 cu-in, Steel, Pre-Galvanized, Silver

Additional Description: TB -531511/23/4 (N) 4INSQ EXTRING,STL,21CU,1/2&3/4-KO RING,STL,21CU,1/2&3/4-KO NON-CANCELABLE, NON-RETURNABLE

Catalog Description: Square Box Extension Ring, 21 Cubic Inches, 4 Inch Square x 1-1/2 Inch Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel