Full Technical Description: 18-7/8 Inch L X 20-7/8 Inch W X 16-5/8 Inch D Overall Size; 17-1/8 Inch L X 19-1/8 Inch W X 13-3/16 Inch D Inner Size; UL 1203, CSA C22.2 Approval; Class I Div 1 and 2 Group B C D, Class II Div 1 Group E F G, Class II Div 2 Group F G, Class III, NEMA 4/7B/7C/7D/9E/9F/9G, IP66 Enclosure; Threaded Cover Type; Feraloy Iron Alloy Body Material; Copper Free Aluminum Cover Material; Electrogalvanized Aluminum Acrylic Painted Body Finish; 16-3/4 Inch Cover Opening Diameter; Natural Cover Finish; Constructional Feature Explosionproof, Dust-Ignitionproof, Raintight, Watertight; Application Wet Location; GUB Model