These earrings are made with metal allergy-friendly, tarnish-resistant, and rust-resistant materials. Classic stud mini drop earrings. Made with 316L stainless steel] This material is stainless steel, known for its "rust-proof" properties, and is also extremely hypoallergenic. Furthermore, since it's stainless steel, it's water-resistant, doesn't tarnish, and is rust-proof, which are its main features. It's the perfect material for accessories that you can use for a long time. You can also wear them in the bath or while playing sports! Material: 316L Stainless Steel Size: 10mm Color: Silver *Sold as a pair. There may be days when shipping is unavailable. Please read the profile before purchasing. Thank you for your understanding.