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Flexible Air Duct Product #:12PFMHP812" x 25', 16" WC Positive, 1" WC Negative, 6000 FPM, R.8, Metalized Polyester Jacket, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreAir Duct Product #:18PF818" x 25', 5000 FPM, Black Polyethylene Jacket, 2-Ply Black Polyester Core, R-8.0, Class 1, Flexible, Air Duct Learn MoreAir Duct Product #:20PF820" x 25', 5000 FPM, Black Polyethylene Jacket, 2-Ply Black Polyester Core, R-8.0, Class 1, Flexible, Air Duct Learn MoreFlexible Air Duct Product #:9PF89" x 25', R-8, 5000 FPM, Black Polyethylene Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:10PF810" x 25', R-8, 5000 FPM, Black Polyethylene Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:4PF84" x 25', R-8, 5000 FPM, Black Polyethylene Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:18PFM818" x 25', R-8, 5000 FPM, Silver Metalized Polyester Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:8PFM88" x 25', R-8, 5000 FPM, Silver Metalized Polyester Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:8PF88" x 25', R-8, 5000 FPM, Black Polyethylene Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn MoreFlexible Air Duct Product #:6PFM86" x 25', R-8, 5000 FPM, Silver Metalized Polyester Reinforced with Fiberglass Scrim Jacket, Black 2-Ply Polyester Film Encapsulated Steel Wire Helix Core, Class 1, Insulated, Plain End, Flexible Air Duct Learn More