Imperial 12-in x 300-in Insulated Polyester Flexible Duct | MEA-1225-8

Silver reinforced polyester reflective jacket. Energy efficient R-8.0 fiberglass insulation. Durable core constructed with non-corrosive coated wire. Oversized core to fit on collars and register boxes. Meets all R-8.0 energy codes. Check your local building codes. UL 181 class 1 air duct.