Product HighlightsBuilders Best flexible pipe is class O metal duct that is non-insulated, general purpose venting duct for low and medium operating pressures. It is non-combustible and made of corrugated aluminum with water-tight continuous lockseams with one crimped end.
California residents: see Proposition 65 Warning
Weight 11.68 Pounds Length 23.75 Inches Width 18.25 Inches Height 13.75 Inches Country of Origin USA Brand Builder's Best Adjustable Yes Color Silver Composition Aluminum Compressed Yes Duct Diameter 4" Duct Size 4" x 8' Gauge Medium Gauge
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