5" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Floor Grille High Quality – Rigid aluminum

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

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

+ Product Details High Quality - Aluminum housing on the outside and on the inside for the best insulation value

+ Product Details Size – 14"w X 10"h is the size for the duct opening measurement only

5" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Floor Grille High Quality – Rigid aluminum+ 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 8. 0 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