EARRING BACKS: made from soft silicone, hypo-allergenic and nickle-free, pliable and comfortable to wear SECURE YOUR EARRINGS: hold fishhook earrings, straight post earrings, earring studs, dropping earrings and most other earrings safely in place, especially the heavy earrings, perfect for DIY jewelries 500PCS EARRING STOPPERS: 250 pairs rubber earring backs, sufficient for your spare and replacement for your lost or torn one EASY TO USE: earring safety backs slide easily onto the posts, safely hold your earrings in place without loosening WARM TIPS: silicone earring backs are tiny jewelry accessories, please keep the clear rubber earring backs away from little kids under 3 years old