40.0 Cu. In. Two gang electrical box for use with nonmeatllic sheathed cable - Molded-in spline device holes, slot provision for low voltage divider, rectangular exterior for easy cut-in - Old work residential construction 2 HR fire resistive walls - Polycarbonate - Thermoplastic - Size: D=3 3/8", W=4 1/8", H=3 11/16" - Mount with Metal wing brackets/nonmetal ears wall compression