The Tamiya 89914 Transparent 3-Speed Crank Axle Gearbox Kit provides a see-through housing so hobbyists can watch gear interaction in real time. Suited to classroom projects and home workshops, this kit features colourful green and gray gears for visual contrast while you learn about gear ratios and axle motion. It is supplied as an educational component and is not intended for competitive Mini 4WD racing.
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