Usongshine Nema 17 Stepper Motor 42BYGH 1.8 Degree 1.5A 42 Motor (17HS4401S) 42N.cm (60oz.in) 4-Lead with 1m Cable and Connector for DIY CNC 3D Printer (Pack of 3)
Pololu - Stepper Motors
What do NEMA frame sizes mean - a torque, size and speed guide.