This is the most popular Nema 17 model. It is equipped with 1.8 degree step angle (200 steps / revolution)
Each phase current is 1.5A & phase reslstance 1.5ohms, and the holding moment is 40Ncm.
NEMA 17 bipolar 4-wire:red(A+), blue(A-), green(B+), black(B-); wire length: 31.5 inches
Warning: It should be connected to a constant current or chopper driver as a stepper motor. If you connect the motor directly to a power supply, the motor is destroyed.
this is nema 17 stepper motor(17HS4401S)