Earring Backs, Silicone Earring Backs, Studs, Soft Earring Back Replacements, Anti-Slip Stoppers, for Fish Hook and Hoop Earrings, Clear, 6mm, 150 Pieces I used four of them. I didn't count them for hygiene reasons, so I'm not sure if there are 150, but I bought them new on Amazon. The box has been discarded, just the items.