OZ-Gedney Type 4Q-FM Combination Coupling, Trade Size: 3 IN, 4-7/8 IN Outside Diameter, Length: 3-3/8 IN, Flexibility: RMC And IMC, Malleable Iron, Steel Ferrule, Connection: FNPT Hub, Enclosure: NEMA 4, Third Party Certification: UL File Number 11853, CSA 009795, Applicable Third Party Standards: UL 514B, CSA C22.2 No.18, Federal Specification W-F-406E, NEMA : FB-1, Hazardous Locations: Class I, Division 2 per NEC 501.4(B), Class I, Zone 2 per NEC 505.15(C)(2), Class II, Division 1 per NEC 502.4(A)(1)(e), Class II, Division 2 per NEC 502.4(B)(2), Class III, Division 1 per NEC 503.3(A)(2), Class III, Division 2 per NEC 503.3(B), intrinsically Safe Per NEC 504.20, For Threaded Rigid Conduit And IMC