18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter The smooth

The smooth

protecting it from outside elements

R value rating of insulation - r3

+ Product Details Size – Stick-on collar is 16" and it is compatible with duct 16"

and smooth surface for years to come

18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter The smooth+ 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