This stepper motor (MPN PHB20Y40-406) is supplied by one of the China's top stepper motor suppliers (PrimoPal Motor). It's a bipolar NEMA 8 hybrid stepper motor with 1.8° step angle (200 steps/revolution), made of high-quality cold rolled steel sheet and anti-high temperature permanent magnet. The rated current is 0.6A per phase, allowing for the holding torque of 2.4Ncm (3.40oz-in). This high-performance and high-reliability motor is terminated with 4 flying ended lead wires, and easily connected to the constant current or chopper drive controller.