Full Technical Description: 3-3/4 Inch L X 3-3/4 Inch W X 1-15/16 Inch D Overall Size; (2) 1/2 Inch, (1) 3/4 Inch Hub Size; 3 Hub(S); UL 1203, CSA C22.2 Approval; Strap Mounting; Class I Div 1 and 2 Group C D, Class II Div 1 Group E F G, Class II Div 2 Group F G, Class III Enclosure; Externally Threaded Cover Type; Feraloy Iron Alloy Body Material; Copper Free Aluminum Cover Material; (1) Top, (2) Bottom Hub Location; Electrogalvanized Aluminum Acrylic Painted Body Finish; 3 Inch Cover Opening Diameter; Natural Cover Finish; Applicable Standard CEC, NEC; Constructional Feature Explosionproof, Dust-Ignitionproof; GUA Model