This is a pin brooch base for handicrafts. Material and manufacturer are unknown. There are probably 100 pieces. How about for resin/epoxy resin accessories or decoration parts? Sold as a set, not for individual sale. The outer bag has aged slightly due to long-term home storage. If you don't mind, please consider purchasing. Bulk purchases are welcome. We will offer a discount if you request a bulk purchase! Please purchase only if you understand that this item has been stored at home and has been inspected by an amateur. m(_ _)m