4 COLORS: Package included 4 colors stainless steel earrings setting, golden/rose gold/gunmetal/stainless steel color,each color 10pcs(5pairs), 40pcs(20pairs) in total. Size 10x1mm, hole: 1.5mm; pin: 0.8mm. PRECIOUS MATERAIL: Stainless Steel, durable and anti-oxidation, good for your long use, good for health. Good for everybody, best choice for those who have sensitive ears. MATCH EVERYTHING:Whatever the outfit or jewelry you wear,no matter the metal you pair them with,Hypoallergenic earring will still look amazing. You could choose the cabochons you like and glue it on to the round. USAGE SCENARIOS: Replace the lost backings,avoid losing your precious ear rings. Replace existing metal earring backs if your have a metal allergy/sensitive skin. Skillfully executed detailed design makes the earrings findings of unique style. EARRINGS: Earring post,Easy to put on and off. Light weight and comfortable to wear. Also ideal for fashion jewerly earring designers and DIY earring makers. The earriing backs could use not only this earring, but also use on your own earring as a replacement.