Description:
This motor is a NEMA-23 motor that is 50 mm long. It produces a whopping 12000 g-cm of holding torque and fine resolution. The motor is also very efficient in converting current into torque and velocity.

This is a Bipolar 4-wire Stepper Motor, recommended voltage is 12 V. Lower voltage also works but gives a lower torque and speed. This stepper features 0.9° Step Angle, power use is at 2.8 A maximum.

Specifications:
Motor Type: Bipolar Stepper (4-wire)
Step Angle: 0.9°
Step Accuracy: 5 %
Holding Torque: 12 kg·cm
Rated Torque: 11.2 kg·cm
Maximum Speed (w/1063 Motor Controller): 300 RPM
Maximum Speed (w/1067 Motor Controller): 2250 RPM
Acceleration at Max Speed(w/1067 Motor Controller): 800000 1/16 steps/sec²
Recommended Voltage: 12 V DC
Rated Current: 2.8 A
Coil Resistance: 900 mΩ
Shaft Diameter: 6.4 mm
Mounting Plate Size: NEMA - 23
Weight: 695 g

Resources:
More information to be found in the Stepper User Guide
Mechanical Drawing