About a year ago, I purchased a limited edition item from Aoyama Decarbo. These are two novelty bijou buttons that came with it. I've been storing them at home. They sound like metal, so I believe they are made of metal. They would be very cute to use on buttons, hair ties, or accessories. I think they are rare items, so collectors, please take a look! I will ship via Mercari. I will offer a small discount for combined purchases.