Ideal-Air 736422 10-Inch Flexible Ducting - Brown/A - HVAC Air Duct for Home, Office & Commercial Ventilation Systems

I bought this Coupler along with this Ducting: https://www.amazon.com/gp/product/B01FY1WKZC/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 plus a couple 10" clamps and some mastic tape.I was able to fix a 3-ft section of crushed ducting in my attic in about 1-hour. And at 1/3 the cost of a big box store (for the parts) or 1/10th the cost of having it done by HVAC Co. Products were delivered in perfect condition. Not much else to say other than i couldnt be happier with the purchases.