12” x 25’ Fully Insulated Air Duct (DUC-21)FULLY INSULATED AIR DUCTING Our fully insulated air duct is, designed for years of use. It will handle temperatures up to 140 degrees and will not kink. It comes in 25’ sections which can be cut to length. Available in 4”, 6”, 8” and 12” diameters. UL listed.
 | Manufacturer's Product Information |  | | | | |
