Crystal Disco Ball Earrings 4mm Sterling Silver Post Stud Earrings (E7141) Size: 4 mm. Photo enlarged to show detail. Material - genuine 925 sterling silver ( stamp on the butterflies ). Nickel and Lead free. Conform to International, European an American legislation regarding lead, nickel and heavy metal content. Finishing - E-Coat protects the sterling silver from tarnishing for an extended period and lets the natural beauty of the sterling silver come through. Imported