Too many brass bits are not very high quality and wear out too quickly, even for brass. So what to do? Switch to hardened steel. They will eventually be worn in about 10 years. At first I thought they were mislabeled when they arrived. The tip seemed to be the same size for everyone and that size seemed to be around 0.8 or 1.0mm BUT NOT THAT! The ends are cut off and the hole is correct as indicated. The reason for this reduction appears to be print quality. don't pull on the pressure, pull on what's just been laid down. So far no complaints. I will be purchasing a few more kits and adding them to the line of printers I will be making. Considering the price, there is no reason for manufacturers to use brass over hardened steel. Just add 5-10 dollars to the price.
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