Heavy Duty Inflatable Fenders. Made from reinforced materials with Stainless Steel “D” ring on each end. Standard inflatable boat air valve for quick (under one minute) inflation and deflation. Use them to traverse locks, raft up with other boats, on an end dock when you aren’t able to get the good slips when cruising out of your home waters, or just as your everyday fenders, and many other uses. Requires minimal storage space.