I've seen others claim they don't fit. That is not completely right. They have a little burr in the nozzle hole so the right needle won't go through like in the kit. Before using them make sure you take the needles and press one of the right size and work it around the hole to push that burr out. I recommend sanding the end lightly with fine sandpaper to completely remove the burrs. Make sure you hold it vertically while doing this. After figuring out the ridges, they work great for me on Ender 3.
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