This motor can replace the motor included with the Tamiya Mini Motor 4-speed, 8-speed, and 12-speed gearboxes and has 20% more power than the motor included with those gearboxes.

The Tamiya 75026 Mini Motor set includes:
One motor
One 8 toothed 0.5M pinion gear
Vinyl tubbing
Double sided tape

Specs
Free-run speed at 3V: 10500 rpm
Free-run current at 3V: 100 mA
Stall current at 3V: 1.1 A
Stall torque at 3V: 0.3 oz-in
Size: 19 x 16 x 12 mm
Weight: 0.39 oz