500PCS 0.5M 20T Plastic Crown Gear 0.5 Modulus 20 Teeth Aperture 3mm 2.95mm Speed Reduction Gears DIY Model H= 4.6mm *FD912X500

500PCS 0.5M 20T Plastic Crown Gear 0.5 Modulus 20 Teeth Aperture 3mm 2.95mm Speed Reduction Gears DIY Model H= 4.6mm *FD912X500
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sku: 4000152801356
$24.99
Shipping from: China
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