12" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w6h6 + Product Details Size -

+ Product Details Size - 20"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 6"h is the size for the duct opening measurement only

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+ Product Details Size – 10" X 2" is the size for the duct opening (floor/vent hole) measurement only

12" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w6h6 + Product Details Size -+ 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