Ever since I installed these nozzles, I've been having issues with leaks. I've come to the conclusion that they don't fit perfectly and that's why the filament bleeds through the threads of the tightened nozzle onto the impression. I've made several successful prints with these nozzles, but sometimes a drop falls on the print and causes an error. So, despite their cheapness, they work in most cases. But if you're looking for something that works almost 100% of the time, I might have to recommend another brand.
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