18" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Aluminum and its seamless drop-in installation

and its seamless drop-in installation process ensures effortless setup

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

+ Product Details Size – 12"w X 18"h is the size for the duct opening measurement only

'block' : 'none'

18" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Aluminum and its seamless drop-in installation+ 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 8. 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