4.8 Cu. In. 4 square inch electrical junction box 3/0 outlet box plaster ring - Quick change/assemble cover screw holes and slots, machine tapped fixture holes, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures - Cover for Allied Moulded 4 square inch junction boxes (9339, 9342, and 9343) with provision for 3/0 outlet profile and use with 1/2" drywall - Fiberglass reinforced polyester - thermoset box - Size: D=11/16", W=4 1/16", H=4 1/16" - Mount with 2 screws