The 210:1 Micro Metal Gearmotor HPCB 6V with Extended Motor Shaft from Pololu is a compact, high-power brushed DC motor. It operates at 6V, has a 210.59:1 metal gearbox, and features long-lasting carbon brushes. The motor has a cross-section of 10 x 12 mm, with a D-shaped gearbox output shaft that is 9 mm long and 3 mm in diameter. Additionally, it comes with a 4.5 x 1 mm extended motor shaft for added functionality. Key specifications include a voltage of 6V, a no-load performance of 160 RPM with a current of 150 mA, and a stall extrapolation of 2.8 kg⋅cm (39 oz⋅in) with a current of 1.5 A.This Pololu gearmotor is perfect for a wide range of applications. It's ideal for DIY projects, robotics, and automation systems where compact size and high power are required. The extended motor shaft provides additional mounting options, making it extremely versatile for different design needs. The unique feature of this gearmotor is the combination of its compact size and high power. Despite its miniature size, it doesn't compromise on performance, offering high speed and torque. The long-life carbon brushes ensure durability and longevity, reducing the need for frequent replacements and thus offering cost-effectiveness in the long run. The 210:1 metal gearbox offers high torque, making it suitable for applications that require substantial force. Moreover, the D-shaped output shaft ensures secure coupling, preventing slippage during operation. With its robust features and flexible design, this Pololu gearmotor is the perfect choice for your next project.