4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Fixed Blades This grille enhances airflow efficiency

This grille enhances airflow efficiency

+Product Details Size – 1/4" x 50'

We Use Special Materials To Prevent Corrosion

+ Product Details Size - 28"w X 12"h X 2"d (for duct opening measurement only)

4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Fixed Blades This grille enhances airflow efficiency+ 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 6. 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