The Pololu 100:1 Metal Gearmotor 20Dx44L mm 6V CB with Extended Motor Shaft is a compact yet powerful brushed DC gearmotor. It features a 6V brushed DC motor equipped with durable carbon brushes and a 100:1 metal spur gearbox. The cylindrical gearmotor has a diameter of 20mm, and the D-shaped output shaft is 4mm in diameter and extends 18mm from the gearbox's face plate. It also includes a 6x2mm extended motor shaft for added functionality. The gearmotor's key specifications include a voltage of 6V, no-load performance of 140 RPM and 150 mA, and stall extrapolation of 5.4 kg⋅cm and 2.9 A. These specifications ensure that the gearmotor delivers superior performance and reliability. The Pololu 100:1 Metal Gearmotor is perfect for a wide range of applications. It can be used in robotics, automation, and other projects where compact size and power are essential. The extended motor shaft provides additional leverage, making it easier to connect to other components and devices. The gearmotor's unique design and properties offer several benefits. The long-life carbon brushes ensure the motor's longevity, while the metal spur gearbox provides efficient power transmission. The extended motor shaft increases the gearmotor's versatility, making it suitable for a variety of applications. In conclusion, the Pololu 100:1 Metal Gearmotor 20Dx44L mm 6V CB with Extended Motor Shaft is a compact, powerful, and versatile solution for many projects. Its unique features and benefits make it a preferred choice for professionals and hobbyists alike.