Three gang electrical box for use with nonmetallic sheathed cable

42.5 Cu. In. Three gang electrical box for use with nonmeatllic sheathed cable - Machine tapped device holes, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures - Old work residential construction 2 HR fire resistive walls - Fiberglass reinforced polyester - thermoset box - Size: D=2 7/8", W=5 15/16", H=3 1/4" - Mount with Metal wing brackets/metal ears wall compression - Three metal wire clamps factory installed