4" Inch Aluminum Hose Flexible Air Duct Pipe for Rigid HVAC Flex Ductowrk - 25' Feet Long

Aluminum Hose Flexible Air Duct HVAC Duct Ductwork   High Quality: Aluminum Housing On the Outside and on the Inside For The Best Insulation Value Air-tight Inner Core Decreases The Pressure Loss and Provides A More Hygienic Environment- High Energy Efficient / No fiberglass erosion into air stream. Designed To Withhold Bends And Sharp Turns Without Kinking Tough Reinforced Metallized Polyester Jacket - Tear and puncture resistant - Air-tight Inner Core - No fiberglass erosion into air stream. Registers Grills vents Heat and Cool Home Improvement HVAC Supplies