Sealing Fitting - Vertical Trade Size 3/4 in Ends - Hazardous Fittings 3/4 in FNPT x 3/4 in FNPT Overall Length 3 11/16 in Iron Hazardous Location Rating Class I Division 1 and 2 Groups B C D Class II Division 1 and 2 Groups E F G Class III Thread Gender Female to Female Used In Hazardous Locations to Minimize the Passage of Gases and Vapors and Prevent the Passage of Flames from One Portion of the Electrical System to Another Through the Conduit Gray