HVAC Premium 7" Inch Flexible Aluminum Ducting Hose Insulated R-8.0 Air Duct Pipe for for Heavy Duty HVAC & Exhaust Ductwork Insulation - 25' Feet Long - in Accordance with UL 181 7 Inch - 25 Feet is up for auction in Tools & Home Improvement. The current bid is $2.50, 98% below the $126.00 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.