Quietflex Flex Duct 4 in. Diameter

The quietflex rip-stop silver jacketed flex duct has metalliac, polyester-vapor barrier with a special rip-stop scrim reinforcement. Johns manville formaldehyde-free fiber glass insulation weather-resistant packaging easy-to-carry package quick clean-up and easy disposal used for run outs to ceiling diffusers or mixing boxes or wherever duct runs in difficult spaces or around obstacles energy efficient lightweight and flexible, easy to install airtight inner core insures no fiberglass contact with the air stream tear and puncture resistant reinforced metalized polyester jacket easier to cut than a standard scrim reinforced product data printed on the jacket for ease of inspectors and installers hud/fha standards 515.2.1, Paragraph b nfpa standards 90a and 90b meets most federal, state, and local codes and standards etl listed/approved.