Hubbell Electrical Products Explosionproof Junction Box B7EP

5.75 INCH L X 6.31 INCH W X 8.06 INCH H OVERALL SIZE 3.63 INCH L X 5.06 INCH W X 6.31 INCH H INNER SIZE 1 INCH HUB SIZE 2 HUB(S) CSA (CANADA AND US) APPROVAL SURFACE MOUNTING CLASS I DIV 1 AND 2 GROUP B C D, CLASS L ZONE 1 AND 2 GROUP IIB + H2 IIA, CLASS II DIV 1 AND 2 GROUP E F G, CLASS III, NEMA 3/4/4X/7 B/7C/7D/9EFG ENCLOSURE BOLTED, HINGED COVER TYPE COPPER FREE ALUMINUM BODY MATERIAL ELECTROSTATICALLY APPLIED GRAY POWDER POLYESTER PAINTED BODY FINISH ELECTROSTATICALLY APPLIED GRAY POWDER POLYESTER PAINTED COVER FINISH CENTER TO CENTER SPACING SIZE 2.5 INCH INCLUDES 316 STAINLESS STEEL BOLT, SILICONE O-RING GASKET, LUG