Prusa BearBMG fusion indirect filament sensor for MK3  MK25
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Prusa Bear-BMG fusion (indirect filament sensor) for MK3 / MK2.5

This Bear BMG extruder is a fusion of excellent extruder made by Pekcitron Bear Extruder and the bondtech BMG 31 ...

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Prusa Bear-BMG fusion (indirect filament sensor) for MK3 / MK2.5 alternatives