18" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Aluminum - Cube Core box-shadow: 0 4px 8px rgba(0

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875" width X 15

75" width X 21

High Quality – Polished pre-finish gloss varnish ready to install - can also be sanded and re-finished according to application needs

18" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Aluminum - Cube Core box-shadow: 0 4px 8px rgba(0+ 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