A high-power miniature Pololu from the HP series. The motor with gear 210:1, shaft speed is 150rpm, torque is 3kg*cm (0.3Nm). The motor has an extended shaft which makes it easy to attach the encoder. Pololu 2216

DC motor with 1:48 plastic gearbox and double-sided shaft. Equipped with incremental encoder with Hall sensors. Includes bracket, mounting hardware and cord

Small metal gear motor, 1000 RPM speed, 3V operating voltage. GA12-N20-0009

DC motor with hollow dome. Features a compact and lightweight design, making it ideal for applications requiring small size and low weight

Mini water pump designed for home automatic irrigation systems. It can be submerged in water. The pump is supplied with the voltage of 4.5 V and has a power of about 0.91 W. Pimoroni COM3700

A small motor with a plastic 120:1 gear, the output shaft at an angle of 90°, operating voltage 4.5 V, current consumption from 0.08 A to 0.8 A, speed 120 RPM and a maximum torque of 1.4 kg*cm. Pololu 1123

Silicone tube with an internal diameter of 5 mm and a length of 1 m for the Grow water pump. It will work in home automatic irrigation systems. Pimoroni COM3800

15:1 Micro Metal Gearmotor. Pololu 4784

Miniature peristaltic pump powered with the voltage 12 V. Made of durable materials, ensures long operation with low noise level. The set includes hoses.

A small motor with a metal gear ending with a shaft with M3 thread, rotation speed 50 RPM, operating voltage 6 V. GA1036-N20M-0053

Solarbotics GMW (GM2/3/8/9 Gear Motor Mount - ONE mount)

Add quadrature encoders to your 20D mm metal gearmotors (extended back shaft version required) with this kit that uses a magnetic disc and Hall effect sensors to provide 20 counts per revolution of the motor shaft. The sensors operate from 2.7 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit.

Small metal gear motor, 300 RPM speed, 3V operating voltage. GA12-N20-0007

Small metal gear motor, 200 RPM speed, 3V operating voltage. GA12-N20-0006

These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 8 mm diameter motor shafts. The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws.

Small metal gear motor, 50 RPM speed, 6V operating voltage. GA12-N20-0010

Set of two magnetic encoders for use with micro motors. Side mounting, set of 2. Pimoroni PIM605

Small metal gear motor, 1000 RPM speed, 12V operating voltage. GA12-N20-0027

These 20 mm long aluminum adapters convert a 6 mm diameter shaft to a 12 mm hex shaft that is compatible with many common hobby RC wheels. Pololu 2686

Tamiya 70168 Double Gearbox Kit