20T +10T 0.5M Dual Gears 2mm Tight / Loose Hole 20 Teeth OD=11mm + 10 Teeth od=6mm Plastic Pinion Toy Accessories 20102A 20102B

20T +10T 0.5M Dual Gears 2mm Tight / Loose Hole 20 Teeth OD=11mm + 10 Teeth od=6mm Plastic Pinion Toy Accessories 20102A 20102B

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