NEMA17 Stepper Motor, which is also called 42 Stepper motor. It is the standard Stepper motor used for Reprap or other 3D Printers. The wires are 400mm long. 

Specs 

Model #: 17HS4401 

Features 
- Smoother operation ( for finer 3D prints ) 
- Longer using life 
- Lower noise 

Step Angle ( Deg): 1.8 Deg 
Motor Length (mm): 28mm 
Rated current (A): 1.7 A 
Phase Resistance (Ohm): 1.5 Ohm 
Phase Inductance (mH): 2.8 mH 
Holding Torque (N.cm min): 40 N.cm 
Detent Torque (N.cm max): 2.2 N.cm 
Rotor Inertia (g.cm2): 54 g.cm2 
Lead Wire N0.: 4 
Motor Weight (g): 280 g 

Wire Color Phase 
Red Phase A 
Blue Phase A Return 
Green Phase B 
Black Phase B Return