84 lb, Steel, Finish Zinc Plated, Hazardous Location Rating Class I, Divisions 1 and 2, Groups C, D, Class II, Divisions 1 and 2, Groups E, F, G, Class III, Divisions 1 and 2, UNF, Conduit Fitting Type Union, Fitting Type Union.Steel Union, Thread Gender Female to Female, Overall Length 1 15/16 in, Outside Diameter 2.