Explosionproof Conduit Outlet Box, Style LB, Hub Size 1 Inch, Hub Type Internal, External, Number of Hubs 2, Hub Location (1) Side, (1) Down, Capacity 18.8 Cu Inch, Shape Round, Cover Type Externally Threaded, Cover Opening Diameter 3-11/16 Inch, Enclosure Class I Div 1 and 2 Group C D, Class I Zone 1 and 2 Group IIA IIB, Class II Div 1 and 2 Group E F G, Class III, NEMA 7CD/9EFG, Material Lacquer Finished Copper Free Baked Aluminum, Approval UL, CSA C22.2, Applicable Standard NEC, Application Pulling of Wires, Hazardous Location, Used On Rigid/IMC Conduit, Includes Grounding Screw, Cover, Tapered Threaded Hub