Material：925 Sterling Silver These Open Jump Rings are made of top quality and authentic 925 sterling silver. Color: Rhodium Color, a little bit darker than silver color For preventing oxidation, the sterling silver rings are electroplated with a layer of alloy on the surface. Type: Open Jump Rings / Split Jump Rings Outer Diameter: 3mm/4mm/5mm/6mm/7mm/8mm Thickness: 0.6mm(22gauge) / 0.8mm(20gauge) / 1.0mm(18gauge) Outer diameter × Wire Thickness: 3mm × 0.6mm (22gauge) 3mm × 0.8mm (20gauge) 4mm × 0.6mm (22gauge) 4mm × 0.8mm (20gauge) 5mm × 0.8mm (20gauge) 6mm × 0.8mm (20gauge) 7mm × 0.8mm (20gauge) 8mm × 1.0mm (18gauge) Lot: 10pcs/25pcs/50pcs/100pcs/250pcs INCLUDE IN THE PACKING: 925 Sterling Silver Open Jump Rings are packed in a resealable bag. Including with an anti-tarnish paper and silver polishing cloth, they can help to keep earring backs in best performance. DIY FAVORITE: Jewelry making jump rings are great for DIY your special & unique jewelry, Excellent for suspending small items from delicate necklaces, bracelets, earrings, anklets. These open jump rings are not only for jewelry making, but also for repairing jewelries, necklaces, bracelets, craft projects etc.