Metal DC Geared Motor - 12V 100RPM 12kg.cm - DFRobot

Metal DC Geared Motor w/Encoder - 6V 100RPM 6.5Kg.cm - DFRobot

12V Low noise DC Motor 146RPM w/Encoder - DFRobot

Turbo Metal Gear Worm Motor (12V 40RPM 8kg.cm) Botland - Robotic Shop

Turbo Metal Gear Worm Motor (12V 40RPM 8kg.cm) Botland - Robotic Shop

12V DC Motor 12kg-cm 350RPM w/Encoder - RobotShop

Search - dc motor - products, projects and tutorials - DFRobot

Pololu 12V 100:1 Metal Gear Motor HP w/ 64 CPR Encoder - RobotShop

12V 100RPM 166 oz-in Brushed DC Motor - RobotShop

12V DC Motor 350RPM w/Encoder (12kg*cm) - DFRobot

Metal DC Geared Motor - 6V 133RPM 4.5kg.cm Botland - Robotic Shop