3Pcs 75 Kinds Plastic Shaft Single Double Reduction Crown Worm Gears For Robo kr

3Pcs For Robot 75 Kinds Plastic Shaft Single Double Reduction Crown Worm Gears. Worm: 2 kinds(each one). Crown gear: 11 kinds(each one). Single gear: 12 kinds(each one). Double gear: 19 kinds(each one).

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