8" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w10h10 only measure the "hole" in

only measure the "hole" in the wall/duct

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+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 10"h is the size for the duct opening measurement only

8" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w10h10 only measure the "hole" in+ 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