8" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Line Covers + Product Details Size -

+ Product Details Size - The listed 12" diameter refers specifically to the size of the duct opening

+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

+ Product Description Enhance your HVAC system with our premium Aluminum Double Deflection Adjustable Air Supply Diffuser

actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height -

8" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Line Covers + 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 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