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Amazon.com: STEPPERONLINE 5PCS Nema 17 Stepper Motor Bipolar 2A 84oz.in 48mm 4-Lead for 3D Printer/CNC : Industrial & Scientific
AUTONICS, NEMA 23 / 56mm Frame, 1.54nm / 218.03 oz-in Max. Holding Torque, Stepper Motor - 5PFF3|A16K-G268 - Grainger
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Stepper Motor - NEMA-23 Size with 9mm GT2 Pulley [140 oz/in 2.8A] : ID 5117 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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