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Amazon.com: PATIKIL Stepper Motor 42-40, 2 Phase 1.5A 0.9 Degree, Extruder Motor with 35 Inch Connecting Cable for 3D Printer CNC : Industrial & Scientific
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Stepper Motor Specifications, NEMA 17 1.8 Degree 200 Steps-per-revolution Four-phase Unipolar Permanent-magnet Stepper-motor
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