Hello☆ Thank you for visiting my shop from among many others. Bohemian Vintage Charm 3mm ♡ 6mm Pearl Beads Each item is carefully handmade, but there may be some slight imperfections due to the handmade nature. We ask for your understanding when making a purchase. Hooks and other parts use Surgical stainless steel, which is less likely to cause allergies. It will remain in a beautiful condition without blackening☆ Earrings can be changed for an additional 100 yen. They are also surgical stainless steel.