Material:Alloy(Lead and nickel free); | Outside diameter:3mm 4mm 5mm 6mm 7mm 8mm 10mm; Varieties choices for all your jewelry making needs; | Quantity: 3mm about 400pcs, 4mm about 400pcs, 5mm about 200pcs, 6mm about 200pcs,7mm about 100pcs, 8mm about 100pcs, 10mm about 50pcs. Total quantity is about 1450pcs. | Perfect for creating professional looking jewelry. Excellent size for suspending small items from delicate necklaces, bracelets, anklets; | Included a plastic box, help you easy to store the small tiny items.If you have any questions feel free to contact us on our seller page.