Hazardous Location Lighting Accessories, For Use With Threaded Metal Conduit for General Purpose Wiring, Overall Length 4 1/4 in, Overall Width 4 1/4 in, Overall Height 2 3/4 in, Material Aluminum, Finish Epoxy Powder Coat, Standards Class I, Division 1 and 2, Groups C, D, Class II, Division 1 and 2, Groups E, F, G, Class III