Category: Tools & Home Improvement
Vendor: "GRAY METAL" FLEX DUCT UL 181 approved Class 1 Air Duct material. Jacketed with a black polyethylene vapor barrier. Airtight co
Product Description : UL 181 approved Class 1 Air Duct material. Jacketed with a black polyethylene vapor barrier. Airtight core is a polyester laminate encapsulating a galvanized spring wire helix. Fiberglass insulation is a minimum of 1-1/4" thick.
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