5" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Fixed Blades with Damper const dt = event

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The 1/2" white insulation

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5" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Fixed Blades with Damper const dt = event+ Product Details High Quality Aluminum housing on the outside and on the inside for the best insulation value Insulation A thick blanket of fiberglass insulation provides you with an R Value of 4. 2 Energy Efficient Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream Design Designed to withstand bends and sharp turns without kinking. Tough reinforced