The TowerPro SG90 9g Mini Servo is 180° rotation servo. It is a Digital Servo Motor which receives and processes PWM signal faster and better. It equips sophisticated internal circuitry that provides good torque, holding power, and faster updates in response to external forces.
6V 60Rpm Geared DC Motor is a mini geared motor with high torque capability despite its small size and because of that it is very suitable for small sized projects that require high torque such as sumo robots. The motor runs at 60rpm at 6V. It is suggested not to run the motor at voltages higher than 6V.