Everbilt 6 in. x 25 ft. R8 Insulated Flexible Duct Silver Jacket
Everbilt 6 in. x 25 ft. R8 Insulated Flexible Duct Silver Jacket. This EVERBILT 6 in. The duct has R8 insulation which contains 50% more insulation than the standard R4. 2 product. The product is also covered in a heavy duty, silver jacket for durability.