5C Collet tube, protects collets from dings & scratches, & hopefully keeps some rust off them.

It's designed to have 3 layer wall thickness with a 0.4mm nozzle. 2 layers was a bit weak.

Threads have a good hold and don't come undone with a very small amount of tightening.

Creality

Ender 3

Yes

No

0.4mm Nozzle, 0.2mm layer height

20%