ITEM NAME:DC 12-40V 2.5A 5Kg.cm 1000RPM 2 Phase Electric Stepper Stepping Motor B6K1 DC 12-40V 2.5A 5Kg.cm 1000RPM 2 Phase Electric Stepper Stepping Motor B6K1 A stepper motor has no brushes or contacts. It is basically a synchronous motor with the magnetic field electronically switched to rotate the armature magnet around. This Stepping Motor features four wires, high torque-to-inertia for faster start and stop. Product Name: Stepping Motor Rated Voltage: DC 12-40V Rated Current: 2.5A Rated Speed: 500RPM Rated Torque: 5Kg.cm Shaft Diameter: 5mm/ 0.2 inch Motor Part Size (Approx.): 42 x 42 x 59mm/ 1.7 x 1.7 x 2.3 inch (L x W x H) Cable Length: 320mm / 12.6 inch(Line color random, does not accept the specified color) Material: Plastic + Metal Color: Black + Silver Weight: 266g Package Content: 1 x Stepping Motor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.