The 150:1 Micro Metal Gearmotor is a small, powerful, and lightweight motor from Pololu which is ideal for use in robotics and other motion systems. It has a 6V extended voltage range, a six-pole ferrite motor, dual ball bearings, and metal gearing for increased torque output. It also features an integrated, high-resolution encoder which can be used to accurately measure position or speed. Finally, it runs at up to 24,500 RPM and is capable of producing up to 68 oz-in of torque when loaded with 6V.