Sealing Fitting - Vertical and Horizontal Trade Size 3 1/2 in Ends - Hazardous Fittings 3 1/2 in FNPT x 3 1/2 in FNPT Overall Length 8 15/16 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 Prevent Passage of Gases Vapors or Flames From One Portion of Conduit Systems to Another Silver Compatible Conduit Trade Size 3 1/2 in Compatible Conduit Type IMC RMC