Sealing Fitting with Drain – Vertical, Trade Size 4 in, Ends – Hazardous Fittings 4 in FNPT x 4 in FNPT, Overall Length 9 3/4 in, Iron, Hazardous Location Rating Class I, Division 1 and 2, Groups 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 4 in, Compatible Conduit Type IMC, RMC, Conduit Orientation Vertical