Explosionproof Cast Junction Box, Hub Size 4 Inch, Overall Size 23.38 Inch L x 21.38 Inch W x 15.06 Inch D, Inner Size 18.25 Inch L x 16.25 Inch W x 11.88 Inch D, Cover Type Bolt-On, Hinged, Enclosure Class I Div 1 and 2 Group B C D, Class I Zone 1 and 2 Group IIA IIB, Class II Div 1 and 2 Group E F G, Class III, NEMA 4/7BCD/9EFG, Body Material Copper-Free Aluminum, Body Finish Shot Blast, Cover Material Copper-Free Aluminum, Cover Finish Shot Blast, Mounting Horizontal/Vertical with Slotted Feet, Approval UL 886, CSA C22.2, Application Hazardous Location, Material Stainless Steel (Hinge), Neoprene (O-Ring)