4 ear hook options to meet your metal sensitivity needs: 1) Nickel free - Our default industry standard and nickel free though not completely hypoallergenic 2) Sterling silver - Works for many people with mild to moderate sensitivities 3) Niobium - Contains no nickel alloys at all and will usually work for the most sensitive ears 4) Sterling Silver Leverback - Goes through the ear like a hook but closes...very secure. * Disclaimer: I provide top quality materials to offer an alternative for...