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Amazon.com: Genuine E3D Slimline Stepper Motor (MT-1701HSM140AE) : Electronics
Usongshine Nema 17 Stepper Motor Bipolar Step Motor for Titan Extruder 3D Printer 4.1V 1A 13Ncm (18.4oz.in) 4 Lead 1.8 Deg with 1m Cable (17HS4023): Amazon.com: Industrial & Scientific