Explosionproof Junction Box, Hub Size 2 Inch, Overall Size 10.25 Inch L x 8.5 Inch W x 8.44 Inch D, Inner Size 9.25 Inch W x 6 Inch D x 7.5 Inch H, Wall Thickness 0.50 Inch (Side), 0.44 Inch (Bottom), Cover Type Threaded, Cover Opening Diameter 7 Inch, Enclosure Class I Div 1 and 2 Group B C D Class II, Div 1 and 2 Groups E F G, Class III NEMA 4/4X/7BCD/9EFG, Body Material Copper-Free Aluminum, Body Finish Gray Epoxy Powder Coated, Cover Material Copper-Free Aluminum, Cover Finish Gray Epoxy Powder Coated, Mounting Feet, Approval UL 886, CUL, CSA C22.2, Application Hazardous Location, Material Neoprene (O-Ring)