14" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length 1-Way damper-link:hover { color: #003366

damper-link:hover { color: #003366

+ Product Details Size - 20"W X 4"H is (for duct opening measurement only)

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With easy installation on drywall

actual front end outer dimensions are approximately 41

14" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length 1-Way damper-link:hover { color: #003366+ 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