30.0 Cu. In. Two gang electrical box for use with nonmeatllic sheathed cable - Machine tapped device holes, 3/16" panel stops, leveling ribs, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures - Manufactured housing construction 2 HR fire resistive walls - Fiberglass reinforced polyester - thermoset box - Size:D=2 3/4", W=4", H=3 3/4" - Mount with Angled mid nails with 3/16" panel stops opposite side