Diameter 22 mm of planetary gearbox,Dongguan Silent,Which is a professional MANUFACTURER of producing gears,gearboxes,gear motors.There are many kind of reduction ratio as the following:
1:6. 1:14, 1:2 3, 1:33, 1:51, 1:86, 1:111, 1:190, 1:246, 1:315,etc
material:stainless,copper.
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