Material:The earring hooks and open jump rings are made of -plated copper,nickel-free and Hypo-allergenic.The earring backs are made of clear silicone.500 PCS Combination: enough for your spare and replacement, keep a long time use.Necessary Jump Rings:This earring making kit comes with a sufficient amount of jump rings, they are perfect to make your own earrings.Elegant Design:The silver-plated earring hooks conforms to ergonomic design, light weight, have exquisite polishing, enjoy beautiful curves and dynamic styles,show the curve style on your ear, suitable for almost all occasions where the earrings are worn.Multiple Use: These french hooks are great for most earring projects. you can use them with your favorite jewelry accessories, make different styles of gorgeous earrings for daily wearing or any special occasions.Colour: silverMaterial: metalPackage Contents:150 x earring hooks150 x single laps200 x earplugsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.