Everbilt 4-inch x 6 ft. Insulated Duct

Needed about 3 feet for a project, so there's roughly 6 feet remaining. Everbilts Flexible Insulated Duct is UL / cUL 181 listed as a class 1 air duct. It has a flexible helix core made of 2 ply polyester laminate and corrosion resistant galvanized wire. It's surrounded by a blanket of formaldehyde-free fiberglass insulation to help reduce heat and cool loss. The jacket is a heavy-duty, fire-retardant, silver polyethylene vapor barrier with reinforced scrim. Can be installed in place of galvanized pipe in most applications. Its flexibility eliminates the need for elbows, making installation easier in hard-to-reach areas. Ideal for general ventilation applications including heating, air conditioning, intake, and exhaust. Made in Canada with domestic and imported parts.