Electronic SpicesMini PWM DC Motor Controller Adjustable Speed Controller Regulation Switch 5A Ultra small LED dimmer with Speed Control Knob works with (3V,6V, 12V, 24V,35V)

Electronic Spices Mini PWM DC Motor Controller Adjustable Speed Controller Regulation Switch 5A Ultra small LED dimmer with Speed Control Knob works with (3V,6V, 12V, 24V,35V)

THEMISTO - built with passion RS-775 DC 12V-24V High Speed Metal Large Torque Small DC Motor Replacement for DIY Toy Cars

Robodo SEN51 PWM DC 6V 12V 24V 28V 3A Motor Speed Regulator Control Switch for DC Motors