H&C | sku: 400006237 H&c 20" X 25' F218 Insulated Flex Duct Silver Jacket H&C 20" x 25' F218 Insulated Flex Duct Silver Jacket ^ Metalized polyester jacket reinforced with fiberglass scrim ^ Double-ply black polyester core ^ R-8.0 formaldehyde free insulation ^ UL listed ^ Boxed or bagged (FB series) ^ MFG# 13102520H Log in for pricing