10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w25h25 It has an outer surface

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

Copper coil line set fits most ductless mini split air conditioners

+ Product Details Size – 4"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 11

10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length w25h25 It has an outer surface+ 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