High Quality:Earring backs are made of rubber, earring posts are made of plastic,they are comfortable, lightweight and durable, not allergic to your ears. PACK OF 100:100 pieces of earring pins and 100 pieces of rubber earring backs, totally 100 pairs can meet your needs well, Enough for your spare or replacement.you can have them changed every day for health reasons Wide Usage:you can wear these as normal earrings to keep your ear holes open ,Sometimes when you are doing sports, working, or having skin irritation problem, you are not allow to wear small earrings ,These plastic stud earrings are suitable to you! Diy Earrings: you can stick some beads, imitation pearls and other objects to make your own earrings Kind Reminder:The earring findings are small earring accessories, please keep these plastic earrings away from to avoid mis-eating and please keep the earring backs rubber and posts in dry environment