Pololu 125:1 Metal Gearmotor 20Dx44L 6V CB w/ Extended Shaft

The 125:1 Metal Gearmotor 20Dx44L 6V CB w/ Extended Shaft can deliver a lot of power for its size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 125:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. It also has a 6 × 2 mm extended motor shaft.