18" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length 18in diameter Width vs Height:

Width vs Height:

85" width X 9

85" width X 19

Solid Rigid Steel Body For Durability and Reliability

but you will appreciate the benefits over the period of time

18" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length 18in diameter Width vs Height:+ 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