The stud earrings are made from recycled oak wood. All settings are made of stainless steel 304. A certificate of nickel release is available. Design requests can also be implemented. Available designs, see selection. Size 10mm with silicone back. Manufacturer: Sonja Ritschmann, Gartenstraße 32, 40764 Langenfeld, info@schmuckwald.de The earrings are treated with a natural oil-wax mixture to beautifully highlight the grain and protect the wood.