Pre-galvanized steel gangable old work switch box, 3” x 2” x 2-1/2”, 12.5 cubic inches. Non-metallic cable clamps (C-5) and 1/2” knockouts. Adapts to any wall thickness up to 3/4”. For use with non-metallic sheathed cable. Total knockouts: bottom cable 2, sides 2 - 1/2”, bottom 1 - 1/2”.