MATERIALS-The earring posts are made of High-quality metal and the earring hooks are made of High-quality metal, which are , comfortable and safe to use, they are friendly for allergic ears A VARIOUS KINDS OF EARRING BACKS-These earring posts and backs includes two kinds of material earring backs ( silicone earring backs) COME WITH JEWELRY MAKING TOOLS-The earring kit comes with a bent tweezer and a jump ring opener. The tweezer can help you pick up the small jewelry findings while the jump ring opener can help you open and close jump rings easily SUITABLE FOR A OF OCCASIONS-These earring supplies are not only suitable for many people, but also fit for a of occasions, such as daily wearing, wedding or party gathering. You can create your unique style earrings to show your personalities Colour: silver Material: metal Size: 12.5 x 6.2 x 2cm Package Contents: 200 x jump 50 x earring posts 50 x screw eye pins 100 x eye pins 200 x earring backs 50 x earring hooks Only 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.