Creality Official K1/K1 Max/K1C Hotend Upgrades Kit, K1 Series Ceramic Heating Block Kit, 3D Printers Hotend with Integrated Quick-Swap Nozzle, Supports 300°C High Temperature, 600mm/s High-Speed

Pretty good I like it but it's a pain In the butt with the disconnect and connections

No sirve para la K1 Max está un poco más chico lo que hace que la boquilla obstruya el cortador de filamento del extrusor.

Perfect drop in upgrade for any 1st gen K1 or K1 Max! Now I am using unicorn nozzles in both the K1 and K1 Max, and will never need to worry about filament oozing out because I didn't tighten the hotend enough again!

Fit and worked perfectly in my K1 Max. Much better design/quality than the factory one.

My K1 is a later model that already has the red cover hot end, it printed well but the nozzle was ready for replacement. When searching for a new nozzle I saw this kit which included the new unicorn nozzle for not much more cost than a replacement nozzle. Bit the bullet and bought this upgrade kit. Install took about 10 minutes, everything fit perfectly. Fired up the machine with a fresh roll of filament. Ran a self test (input shaper and auto level), max flow test, and a very fast temperature test. After about 3 hours of test prints and a couple very minor tweaks my K1 is printing better than it ever has. This new hot end and the new default profiles in the crealitu slicer are so much better than what the K1 shipped with. It's obviously very strongly inspired by the Bambu products but at a fraction of the cost and honesty better part and upgrade availability. Very happy with my K1 and this unicorn hot end.