This 130-size brushed DC motor has a recommended operation voltage of 3 – 12 V and is used in the larger Pololu plastic gearmotors. Approximate specifications at 6 V: free-run speed of 11,500 RPM, free-run current of 70 mA, and stall current of 800 mA.
This is the 130-size DC motor used in the larger Pololu plastic gearmotors (228:1 offset, 120:1 offset, 200:1 90-degree, and 120:1 90-degree). It has a recommended operating voltage of 3 – 12 V; at 6 V, the no-load speed is about 11,500 RPM, the no-load current is approximately 70 mA, and the stall current is around 800 mA. For an estimate of the torque, note that the Pololu 228:1 plastic gearmotor produces roughly 100 oz-in of torque at 6 V using this motor, and the Pololu 120:1 plastic gearmotors produce roughly 75 oz-in of torque at 6 V. The output shaft has a diameter of 2 mm.
More technical information at Pololu.