Detailed Product Description
Geared motor and planetary geared motor:
1) 4.5-24V
2) Reduce ratio: 1/21-1/366
3) 20-500rpm
4) Torque: 0.064-27.5kgf. Cm
5) Other smaller or bigger geared motors available

Model: JGB-310
1) 6V-12V
2) Reduce ratio: 1/51-1/227
3) Speed: 22-117rpm
4) Torque: 0.064-0.54kgf. Cm
5) Efficiency: 41-53%
6) Body: 46 x 24.4mm

Model: JGB-370C
1) 4.5V-12V
2) Reduce ratio: 1/21-1/52
3) Speed: 80-290rpm
4) Torque: 0.29-0.86kgf. Cm
5) Efficiency: 53-73%
6) Body: 54 x 24.4mm

Model: JGB-3XX
1) 4.5V-24V
2) Reduce ratio: 1/21-1/366
3) Torque: 0.064-27.5kgf. Cm
4) Body: ??60 x 31mm

Please find more in this web, such as smaller motor, bigger motor, flat
Motor, geared motor, and brushless motor.