These strokes are interchangeable in Xion and Xion S machines. (1.8mm., 2.5mm., 3.2mm and 3.7mm)

Xion Mini does not have a interchangeable Stroke system, so it is not possible to change stroke for these machines.

Smallest size will work softest, it will land cartridge needles on the skin in shortest intervals. The strength will be smallest.

Largest size will land the needle with the biggest strength. The cartridge needle landing gaps on the skin will be longest.

1.8mm and 2.5mm are mostly recommended for PMU. 3.2mm and 3.7mm are recommended for Tattoo work.