18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Powder Coated + Product Details Size -

+ Product Details Size - 36"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 8"w X 26"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 34" OR 34" x 22" duct opening (measured at the opening)

Actual Filter Size – 33 3/4"w x 7 3/4" x 1"

with no sharp edges

18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Powder Coated + 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 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