Thank you for viewing. This is a set of 30 carabiners. These were found during a warehouse cleanup, and the exact material and weight capacity are unknown. I have confirmed that they function as carabiners for light use. I plan to ship via Yu-Packet Post. Also, I have 30 more of the same item. If you need them, I can offer a set of 60 for 3000 yen, including shipping. Thank you.