Imperial 12-in x 25-ft Insulated Polyester Flexible Duct Mea-1225-6

Silver reinforced polyester reflective jacket. Energy efficient R-6. 0 fiberglass insulation. Durable core constructed with non-corrosive coated wire. Oversized core to fit on collars and register boxes. Meets all R-6. 0 energy codes. Check your local building codes. UL 181 class 1 air duct.