O-Z/Gedney Explosionproof Junction Box YE-181206

21-1/2 INCH L X 15-1/2 INCH W X 9 INCH D OVERALL SIZE 18 INCH L X 12 INCH W X 6 INCH D INNER SIZE 3-1/2 INCH HUB SIZE UL 886, CSA APPROVAL SURFACE MOUNTING CLASS I GROUP D, CLASS II GROUP E F G, CLASS III, NEMA 7/9 ENCLOSURE SCREW ON COVER TYPE CAST IRON BODY MATERIAL CAST IRON COVER MATERIAL 13/16 INCH (SIDE/COVER), 1 INCH (BOTTOM) WALL THICKNESS HOT DIP GALVANIZED BODY FINISH HOT DIP GALVANIZED COVER FINISH APPLICABLE STANDARD NEC 500-503 YE MODEL