This tungsten is a very high quality product, a more homogeneous mixture of lanthanides and tungsten. Much cheaper / Chinese made tungsten does not have a very homogeneous mix of lanthanides in the tungsten base. This causes a lot of weird arc instability problems. If you run those cheaper tungsten electrodes on an inverter machine they will form all sorts of crazy little crowns and eventually the electrode will become so cratered that you can't use it. I have welded quite a bit of aluminum with them and have been very happy with their work. I will not hesitate to buy them again.
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