85pcs Plastic Gear Rack Pulley Belt Worm Gear Single Double Gear Teeth For DIY Model Toy Car Boat Robot Scientific Experiment

85pcs Plastic Gear Rack Pulley Belt Worm Gear Single Double Gear Teeth For DIY Model Toy Car Boat Robot Scientific Experiment
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sku: 1005003107228325
$5.13
Shipping from: China
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