RACO Square Extensions Provide A Means For Adding Cubic Capacity To Square Boxes (Sold Separately).
RACO Square Extensions are made of solid steel for long lasting durability. Can also be used as an outlet box for surface conduits. Combination screw heads allow for fast installation. Choose from models with 1/2", 3/4" or 1/2" and 3/4" side knockouts. Red Boxes are available for dedicated life safety alarm circuits. Sold in package quantities of 25 or 50. UL listed.