10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Supply Grille The operable dampers

The operable dampers

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2" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

If your hole is 14" wide by 20" tall

5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Supply Grille The operable dampers+ 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