DuraTite Systems™ SpeediCollar™ installs in seconds, has no tabs to bend back and puts an end to leaky duct connections at the trunk line. DuraTite's patented collar design includes an integral gasket, non slip retention rings for flex duct applications and 4 Quick Zip connectors. Unlike the multitude of metal collar SKUs, the same DuraTite collar can be used with 1", 1.5" AND 2" duct board as well as sheet metal trunk lines. A full line of sizes including 5", 6", 7", 8", 10" and 12" are available with or without pre-installed dampers. Click the video tab above to watch a product video.