This is Nema17 planetary geared stepper motor. Integrated Planetary gearbox with a 1 : 4 gear ratio at rated torque of 14Kgcm at 70RPM. 

Motor Specifications:

• Step Angle : 1.8 Degree
• Configuration: 4 wire stepper motor
• Holding Torque: 14kgcm
• Rated Voltage: 2.8VDC
• Rated Current: 1.68Amps
• Moment permissible Toruqe : 40Kg.cm
• Rated Speed: 300RPM
• Motor length without Shaft: 76mm
• Gear box lengh(L) : 30mm
• Shaft Length: 17mm
• Shaft Dia: 8mm
• Back shaft Length: 8mm 
• Back shaft Dia: 5mm
• D-cut Length: 15mm 
• Gear Ratio: 1: 4
• Efficiency: 0.71% 
• Weight: 550 grams 

Wiring Details:

• A+ = Black 

• A-  = Green

• B+ = Red

• B-  = Blue

Datasheet