These are silicone type, so I've replaced them with handmade earrings for those with metal allergies. I have a lot of earring backs. The types are as shown in the photos, so please take a look. There's a spare for 9 pieces? It's one. I'm also selling on other sites, so please be sure to comment before purchasing. These are new, but please refrain from purchasing if you are sensitive to such things. These are simple, transparent plastic earring backs, and are convenient as they come in multiple pieces. - Material: Transparent plastic - Use: Earring backs - Quantity: Multiple pieces - Design: Simple Thank you for looking.