This is already my second Stirling. I had ordered the same part about 2 years ago in China. Cost about € 15.00. When a friend from Munich, who is otherwise not particularly interested in steam engines and Stirlings, was very excited about the running Stirling. I gave him the part as a gift. It is now running in Munich. I immediately ordered a new one in China. € 7.80 incl. postage. Unbelievable.