
I've had an lk4 printer for quite some time, used it almost every day, printed a few big chunks and often switched between different filament types without much cleaning in between (I you know, my bad, stupid thing) I needed a printhead replacement after the original got so clogged that even cleaning didn't help. They fit great, the only problem (for the manufacturer, not me) is that they hold so many heads that my printer will probably be replaced before they run out. Great price and great product.

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