Hypoallergenic beauty! This top shelf 20 gauge Niobium ear wire with loop was designed for unprecedented style, comfort and longevity. It's .06 inch loop is perfect for petite designs and the natural grey Niobium color is perfect for hard to match darker silver tone finishes. Niobium is completely hypoallergenic and with proper care will never tarnish or fade. A 20 gauge Niobium Ear Wire with a small 3mm loop. Niobium products are 99.9% pure and are nickel free, which make it an excellent product for anyone who suffers from nickel allergies. Niobium is considered by many to be a semi-precious metal, in that it shares purity characteristics with other metals such as Gold and Silver. Our Niobium products are great for jewelry making, can be easily anodized with various colors, and meet the Mayo Clinic recommendations as well as the EU Nickel Directive.