This is a Master Flow 8-inch diameter R-6 ductwork insulation sleeve, model number INSLV8. Designed to insulate standard 8-inch rigid or semi-rigid round duct pipes up to 5 feet in length, it features a thick fiberglass insulation blanket enclosed in a silver jacket vapor barrier. It helps maintain consistent air temperatures, reduces energy loss, minimizes mold-causing condensation, and absorbs system noise. This item is in used fair condition and comes in a quantity of 1

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