The motor in the picture you linked to is one of our micro metal gearmotors, but that is a common form factor, so unless you know the motor was from us, it is possible that it only looks the same as our motors.
For our micro metal gearmotors, red codes indicate that the motor is an HP motor. To determine what gear ration it is, you could measure the free-run speed. You can see how to measure the approximate free-run speed for the motor in this forum thread. Once you have measured the free-run speed, you can compare the speed to the motors on our micro metal gearmotor page.