Smaller diameter, more driving force.
5 mm bore size. 9mm OD. 7.5 mm effective diameter. 11 mm length.
This product can used for 1.75 mm and 3 mm filament. The groove of this gear is about 1mm deep. For 1.75 mm filament, the groove of idler pulley in the feed block cannot be too deep, a flat surface idler pulley is recommended.
100% brand new and high quality
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