NEMA 8 Bipolar Stepper Motor: 200 Steps/Rev, 3.9V, 0.6 A/Phase | The Pi Hut
NEMA 17 42×42mm 1.5 A 1.8° 0.9° 2.4N.m Hybrid Stepper Motor for height sensor thin round stepper motor - HOLRY
Amazon.com: Twotrees Stepper Motor Nema 17 Motor High Torque 1.5A (17HS4401) 42N.cm (60oz.in) 1.8 Degree 38MM 4-Lead with 1m Cable and Connector for 3D Printer : Industrial & Scientific