Hubbell 2 gang rectangular wooden floor box for wooden floor. Made of stamped steel. Semi adjustable. Debris cover included, removable LV barrier. UL listed, File Number E31999 and CSA certified, File Number LR18416. 2 1/2 inches, 3/4 inches, 1 inch sides knockouts and 2 1/2 inches 1 1/4 inches bottom knockouts. 42.5 cubic inches capacity. Measures 6 27/64 inches length by 4 1/2 inches width by 3 1/8 inches height.