Simple end-belts are the best option for universal connectivity. A small metal clip will help secure the belt firmly. On larger diameters, the belt can be equipped with a belt ratchet.
Metal D-Rings offer a heavy duty option for permanent installations or the use of quick release carabiners.
The loops can be used to hang the entire duct on a rope or hook. This is particularly important with Layflat ducts.
The standard cuffs can be made longer, shorter and equipped with velcro or zipper as may be required.
These can be used to connect the duct to another duct, or a transition piece or velcro adapter. It can also be used to simply block the duct if equipped with ventilation holes.