Metal: Alchemia Lead Free, Nickel Free, Hypoallergenic. Baked lacquer finish to protect metal from turning or tarnishing Earrings Available in following inside diameters: 30mm, 45mm & 60mm. Stainless Steel Post. High Polish Finish. 2.5mm gage Alchemia for Hoop Handcrafted and artisan made All pieces are stamped or hallmarked for authenticity