Extreme Duty Inflatable Fenders. Made from reinforced materials with StainlessSteel "D" ring on each end. Standard inflatable boat air valve forquick (under one minute) inflation and deflation. Use them to traverselocks, raft up with other boats, on an end dock when you aren't able toget the good slips when cruising out of your home waters, or just asyour everyday fenders, and many other uses. Requires minimal storagespace Unconditionaly guaranteed for ONE year!