1Pc 0.5 Mod 1Mod Blue Nylon Plastic Worm Gear Or POM Worm Rod 15 Teeth-80 Teeth Turbine Speed Ratio 1:15/20/25/30/35/40/50/60/80

1Pc 0.5 Mod 1Mod Blue Nylon Plastic Worm Gear Or POM Worm Rod 15 Teeth-80 Teeth Turbine Speed Ratio 1:15/20/25/30/35/40/50/60/80

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