Precision 1:60 0.5M 20T 30T 40T 50T 60T Copper Worm reducer turbine 065/151 4/5/6mm Bore diameter

Precision 1:60 0.5M 20T 30T 40T 50T 60T Copper Worm reducer turbine 065/151 4/5/6mm Bore diameter

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