GX12 Series 2, 3, 4, 5. GX16 Series 2, 3, 4, 5. 6, 7, 8 & 9 pin. GX20 Series 2, 3, 4, 5. 6, 7, 8, 9 & 10 pin. They perform particularly well in areas of high vibration due to screw locking collar and are very popular in makers, hobbyists, 3d printer enthusiasts, Widely used in CNC and 3D printer.
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