4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Sheet Metal/Adjustable Elbow With our extensive selection of

With our extensive selection of Grilles

+ Product Details Size – Sheet metal duct board take off start collar is 4" and it is compatible with duct 4"

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height

it stands as a testament to our commitment to quality

+ Product Details Size – 10"w X 22"h is the size for the duct opening measurement only

4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Sheet Metal/Adjustable Elbow With our extensive selection of+ 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