10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_R-8.0 Pink the second number represents the

the second number represents the height

4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

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Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

10" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Color_R-8.0 Pink the second number represents the+ 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