4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Fixed Blades actual front end outer dimensions

actual front end outer dimensions are approximately 32 5/8" width X 16 5/8" height

making it adaptable to various airflow needs

Actual Filter Size – 29 3/4"w x 35 3/4" x 1"

+Product Details Size – 1/4" x 50'

4" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Fixed Blades actual front end outer dimensions+ 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