JGY-370 DC Worm Gear Motor, 6V 12V 24V High Torque Turbo Geared Reducer with Self-Locking Metal Gears, Reversible Speed Adjustable Electric Motor (12v 90rpm)
High Torque Turbo Geared Motor Gearbox DC 12V Motor 2/3/5/610/20/30/40/62/100RPM (100 RPM)
N20 Dual Shaft Gear Electronic Starter DC 3V 3.7V 5V 850RPM D-Shaft High Torque Turbo Worm Full Metal Gear Box Reduction Motor Drivers
5840-545 Dual Shaft Worm Gear Electronic Starter DC 12V-24V 2.2RPM-4.4RPM Slow Speed High Torque Turbo Reduction DIY Robot Motor Drivers
JGY-370 Turbo Worm Gear Motor with Encoder, DC High Torque Self-Locking Motor, 25kg.cm Max Torque, Low Speed, 3W Output (10RPM 12V)