We only use stainless steel for our jewelry because this material remains very beautiful and does not discolor when it comes into contact with water etc. It also does not irritate or discolor the skin because it is nickel and lead free. Material • Stainless steel • Hypoallergenic • Nickel and lead free size: 10x5 mm. I ship all orders within 1-4 business days. All orders are packed with care and love. The jewelry will be nicely packed and sent in an air cushion envelope. All orders are shipped without tracking code. If you want a tracking code you can choose this during checkout.