Product HighlightsBuilders Best Uninsulated Foil Duct is an UL 181 Class 1 air connector label. It has a multi ply design of metabolized polyester and aluminum/polyester laminate. This uninsulated duct has a 1" pitch and is comprised of a steel wire support
California residents: see Proposition 65 Warning
Weight 4.49 Pounds Length 600.00 Inches Width 4.00 Inches Height 4.00 Inches Country of Origin USA Brand Builder's Best Adjustable Yes Color Silver Composition Aluminum Compressed Yes Duct Diameter 4" Duct Size 4" x 50'
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