Guy
MK8: valid for printers with Mk8 hotend (Ender 3, Ender 3 PRO, Ender 5, CR-10, Anet Et4, Anet A6, Anet A8, Geeetech A10)
Mk10: Valid for printers with Mk10 hotend (Geeetech A10M, etc.)
V6: valid for E3D hotends and clones (Prusa Mk3, Anycubic Mega, Anycubic Chiron, etc)
Volcano: valid for E3D Volcano hotends or compatible (Artillery X1, Artillery Genius)
UM2: valid for BIQU printers
Material
Brass: supplied with the printer, valid for printing of the most common materials (PLA, PETG, ABS, ETC). They have better thermal conductivity than steel nozzles
Stainless steel: suitable for printing objects that will be in contact with food or with the mouth or respiratory tract as it does not contain lead.
Hardened steel: suitable for printing with materials containing hard material chips such as carbon fiber, metal, etc. Its durability with these materials will be longer than a standard brass mouthpiece.
Size
<0.4mm: suitable for maximum detail at the cost of increased print times
0.4mm: most common size, with a good compromise between print time and detail
0.5-0.6mm: nozzles commonly used to gain printing speed without a great loss of detail, also used for materials with large traces such as wood filament.
>0.6mm: used for large prints, the loss of detail is noticeable. For these sizes it is advisable to have a Volcano type hotend, since the amount of material to be melted per second can be too much for a normal hotend.
For materials containing traces of hard materials such as metals, carbon fiber, etc., the use of hardened steel nozzles is recommended.
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