OUTLET BOX TYPE; CHANNEL USED ON; SIZE 4-1/16 INCH L X 1-7/8 INCH W X 2-1/8 INCH H; FINISH ASTM B633 SC3 TYPE III ZINC ELECTROPLATED; INCLUDES (2) 1/4 INCH-20 FLAT HEAD MACHINE SCREWS, (2) N224WO CHANNEL NUTS, DUPLEX COVER PLATE