6" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Supply Grille Heavier gauge than needed

Heavier gauge than needed

but still light and handy

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

Design – Unrestricted airflow for your HVAC system - adjustable one-way louver with full horizontal airflow directional control - single deflection supply grill with 96% airflow - noise free components - no vibrating louvers etc

6" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Supply Grille Heavier gauge than needed+ 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