6 In. Metalized R6 Insulated Flexible Duct (F6IFD Series)

The Master Flow F6IFD Series is UL-approved to create safe, reliable branch lines in HVAC systems. Master Flow insulated duct consists of 4 parts: core, vapor barrier, helix and insulation. Combined, these features result in strong, long-lasting and efficient flexible duct. Indoor use only.