18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter and smooth surface for years

and smooth surface for years to come

75"H – fits a 20" X 18" duct opening

The smooth

protecting it from outside elements

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter and smooth surface for years+ 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