Flexible Duct Air Rip-Stop 6 in Dia 25 ft LG 10 in wc Positive 0.5 in wc Negative -20 to 180 F Continuous -20 to 200 F Intermittent R4.2 Insulation 6000 fpm Max Polyester Vapor Barrier Fiberglass Insulation Silver Jacket Round ASTM C518 Meets ETL HUD/FHA NFPA UL 181