8" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_White Pre-flared ends with nuts are

Pre-flared ends with nuts are for simple and easy installation

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

875" width X 7

actual front end outer dimensions are approximately 21

8" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_White Pre-flared ends with nuts are+ 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