Hubbell Electrical Products Explosionproof Junction Box GRK

9-7/8 INCH L X 8-3/8 INCH W X 6-17/32 INCH D OVERALL SIZE 8-5/16 INCH L X 7-1/16 INCH W X 4-1/8 INCH D INNER SIZE 2-1/2 INCH HUB SIZE UL 886/1203, CSA C22.2, FM APPROVAL LUG MOUNTING CLASS I DIV 1 AND 2 GROUP B C D, CLASS I ZONE 1 AND 2 GROUP IIB+H2 IIA, CLASS II DIV 1 AND 2 GROUP E F G, CLASS III DIV 1 AND 2, NEMA 3/4/4X/7B/7C/7D/9E/9 F/9G, IP66 ENCLOSURE THREADED COVER TYPE COPPER FREE ALUMINUM BODY MATERIAL ELECTROSTATICALLY APPLIED GRAY EPOXY POLYESTER POWDER COATED BODY FINISH 7-1/4 INCH COVER OPENING DIAMETER ELECTROSTATICALLY APPLIED GRAY EPOXY POLYESTER POWDER COATED COVER FINISH APPLICATION HAZARDOUS LOCATION INCLUDES BLANK COVER GR MODEL