Typically, the ring fasteners that come with sealing jars are made from steel, but they sometimes rust. This can cause the appearance of rust on stainless steel sprouting screens around the outer edge. While this does not pose a health risk, it is cosmetically unappealing. This new Stainless Steel Sprouting Ring will not rust, no matter how many consecutive uses, so it's a happy solution to an old problem. Sprout alfalfa, mung beans, and all the other favourite sprouts with confidence. It will hold a screen in place over the mouth of wide mouth Mason, Kerr, and other types of jars.