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154:1 Metal Gearmotor 20Dx44L mm

Vendor's Description: 

This 1.72" x 0.79" x 0.79" gearmotor is a brushed DC motor with 154:1 metal gearbox that has the power to deliver both speed and torque. These units have a 0.276"-long, 4 mm-diameter D-shaped output shaft.Key specs at 6 V: 90 RPM and 250 mA free-run, 120 oz-in (8.6 kg-cm) and 3.3 A stall.