Thank you for viewing. This is a Tiffany sterling silver (Silver 925) earring back. It seems to be called a flower catch. This is a single earring back (one piece) for sale. The shape of the earring backs has changed and this type is no longer sold, so this is for those who have lost their earring backs and are using earrings of a slightly older design. For those who purchase, I will also include the storage bag shown in the product image. Instant purchase is available. Search terms: Tiffany & Co. Sterling Silver Limited edition, rare