1. Screw thread: M3 x 28mm 2. Front optical axis: M2 x 6mm 3. Screw pitch: 0.5mm 4. A large torque low current DC gear motor 5. Operating voltage: 1.5 - 12V DC 6. Rated voltage: 6V 7. No-load speed: 100RPM 8. No-load current: 160mA 9.Reduction ratio: 1:150 10. Rated torque: 0.4kg/cm 11. Stall torque: 3.2kg/cm 12. Great for DIY and robot / smart car / toy projects 13. Come with a plastic box for easy carry and store