Cast Junction Box, Hub Size 3/4 Inch, Overall Size 7.81 Inch L x 7.81 Inch W x 6.41 Inch D, Inner Size 6 Inch L x 6 Inch W x 6 Inch D, Wall Thickness 0.19 Inch (Top), 0.19 Inch (Cover), 0.19 Inch (Back), Cover Type Gasketed Bolt-On, Enclosure Class II Div 1 and 2 Group E F G, Class III, NEMA 4/9EFG, Body Material Cast Aluminum, Body Finish Hot Dip Galvanized, Cover Material Cast Aluminum, Cover Finish Hot Dip Galvanized, Mounting Surface with Lug, Approval UL 886/1203, Application Coal Storage Unit, Grain Elevator, Textile Factory, Tissue Paper Mill, Constructional Feature Dust-Ignitionproof, Watertight