UPC-26TCHR4-6 - Unico SmartDuct, TFS, 2x12', R4 (6 PCS)

Ships in 24x24x23 inch pkg; 32 lbs  Description: Sound attenuator flexible duct 2" inside diameter 4" outside diameter insulated to R4 with 1 vapor barrier. They come in a box quantity of 6 - 12' lengths with Twist-Fit connectors on each end. General Features: Tough aluminized mylar outer wrap Spun-bonded nylon and helical wire core 12′ length x 6 lengths totaling 72' Certified as an air duct per UL181 R-4 2.0" Inside Diameter