4" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Black + Product Details Size –

+ Product Details Size – 12" x 12" is the size for the duct opening measurement only

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 14"h is the size for the duct opening measurement only

Installation Location – Sidewall and ceiling

+ Product Details Size - 30"w X 30"h is the size for the duct opening measurement only

4" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Black + 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 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