OMGEXTRD OMG F1 extruder upgrade for Ender FLSUN SR 3d printer

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The New Upgrade --- Create the latest original upgrade. There are really two driving gears, which are driven together with the other two auxiliary bearings, which doubles the transmission power and greatly increases the stability. It allows you to print flexible and conventional plastic filaments.The 2 driving gear is upgraded from copper to steel, which has better hardness, bite force and durability.