https://www.seeedstudio.com/Gear-Motor-6V-60rpm-Dustproof-p-714.html

Pretty nice Gear Motor with dust-proof enclosure, running at 6v 60rpm.

Specifications

    Operating Voltage: DC 2.4 ~ 6.0V

    No Load Speed: 55 ~ 70rmp

    No Load Current: 30 ~ 70mA

    Max. Efficiency Speed: 40 ~ 52rpm

    Max. Efficiency Current: 350 ~ 450mA

    Torque: 0.7 ~ 1.2kg.cm

    Stall Current: 500 ~ 700mA

    Stall Torque: 3.0 ~ 4.0kg.cm