4" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_White + Product Details Size -

+ Product Details Size - 24"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – 8" x 16" or 16" x 8" is the size for the duct opening measurement only

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

+ How To Measure A Grille Overall Size:

4" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_White + Product Details Size -+ 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