Creality's MK-ST nozzles are high quality hardened copper alloy nozzles, meaning they have high thermal conductivty for more consistancy, high hardness which equals less wear so the nozzles last longer.
This kit consits of 5 nozzels in diffeerent sizes, see below:
0.25mm x 1
0.4mm x 2
0.6mm x 1
0.8mm x 1
CR-6 SE, CR-6 Max, Ender-6, Ender-3, Ender-3 Pro, Ender-3S, Ender-3 V2, Ender-3 Max, Ender-5 Pro, Ender-5 Plus, CR-10, CR-10 V2, CR-10 V3, CR-10Min, CR-10S