I found this while cleaning. I think it's a part for Plarail. I washed it with water, but it's not very clean. I don't want to throw it away, so I'll list it for sale. Weight: 30g. Shipping will be via Yu-Packet Post Mini. Because it's just barely the size to fit in the slot, it will be sent in a simple envelope with minimal packaging. Please be aware of this before purchasing. I can also relist it combined with other items I have for sale.