Explosionproof Cast Junction Box, Hub Size 5 Inch, Inner Size 18 Inch L x 18 Inch W x 8 Inch D, Wall Thickness 0.81 Inch, Cover Type Screw-On, Enclosure Class I Div 1 and 2 Group D, Class II Div 1 and 2 Group E F G, Class III, Body Material Cast Iron, Body Finish Hot Dip Galvanized, Cover Material Cast Iron, Cover Finish Hot Dip Galvanized, Mounting Feet, Approval UL 886/1203, Constructional Feature Explosionproof, Dust-Ignitionproof