Item Condition Opened box - original retail box shows some wear. In excellent condition. Opened but never been used. Item Location Ships from our warehouse in Las Vegas, Nevada, 89102, USA Fast Shipping We handle all paid orders within 1 business day. Best Offers Accepted Offers are reviewed at the close of business each night. We accept reasonable offers for - Multiple units of the same item - Errors or condition changes within our listing - Combining shipping for 2 or more separate orders Return Policy We offer a 30 day return window from when you receive the item. Items must be in the same condition and in original packaging. Product Description The Master Flow 6 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R8 insulation which contains 50% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to save energy. The product is also covered in a heavy duty, silver jacket for durability. The duct is ETL listed, meeting the UL181 standard. Flexible duct is convenient for use in multiple applications including heating and A/C systems and some venting Oversized core to connect quickly and easily to standard sheet metal fitting Galvanized core wire for greater corrosion resistance vs. non-galvanized wire Duct can be cut to length as needed Insulated duct features a maximum temperature rating of 200F Always install per instructions and seal using approved mastic or sealant (or approved tape)