Thank you for viewing. I'm clearing out my parents' house. These are materials for stained glass that my mother used to learn. These are unused sockets left over from making an "oyasumi lamp" (bedtime lamp). I confirmed they light up, but they have been stored at home for a long time. I would be happy if you could use them for practice in a class, etc. The metal fittings are discolored. It may take some time to ship. Even if we are communicating in the comments, the person who completes the purchase procedure first will be given priority. Thank you for your understanding and for using them well.