Eger Advantage Universal Collar

NEW! Improved Design! Also works on competitors air diffusers and air returns.  Don't know your neck size, no need to measure! The Eger Advantage Universal Collar reduces the neck from a 14" to a 6", 8", 10" or 12" neck.  Easy installation - The neck size "diameter" on the universal collar can be easily cut onsite using a box cutter or utility knife at the time of installation. Won't collapse, easily slide the flex duct over the neck of the Universal Collar.