5PCS Mini 6mm Plastic Worm Gear Screw deceleration Gear Turbine 0.5 modulus Worm Gear for Micro Motor 1mm Shaft Toy

5PCS Mini 6mm Plastic Worm Gear Screw deceleration Gear Turbine 0.5 modulus Worm Gear for Micro Motor 1mm Shaft Toy

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