CONDUX 08032920 CONDUIT SEAL OFF 4.00 INCH NEW SEAL OFF BODY SOLD SEPRATELY Conduit Seal-Off Kits Locks into duct with a turn of the wing-nut handle, compressing the rubber ring for a firm seal. 15 psi (1 bar) maximum. Individual Conduit Seal-Offs Part Number Description Nominal Duct Size in (mm