Hotend nozzle with M6 thread. Can be used in E3D, 3draty, Ultimaker and others.
Nozzle size means: output diameter / Input diameter
The 0.1 mm nozzle is for true tuning tunings. With a 0.1 nozzle you have to use quality filaments and not brands like Gembird. Thank you for your understanding.
(Product can be ordered after 1 piece, photo is only illustrative.)