This gearmotor is a miniature high-power, 6V brushed DC motor with a 380:1 metal gearbox. This Micro Metal Gearmotor has stainless steel gearbox plates instead of the standard brass ones for increased durability and resistance to wear from radial loads. It has a cross section of 10 × 12mm, and the D-shaped gearbox output shaft is 9mm long and 3mm in diameter. This motor also has a 4.5 × 1mm extended motor shaft.
Metal Gear Motor 172:1 23DX56L
This gearmotor consists of a low-power, 12V brushed DC motor combined with a 171.79:1 metal spur gearbox. The gearmotor is cylindrical, with a diameter just under 25 mm..