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10pcs Smart Car Toys Plastic Accessories For DIY Model 2mm Optical Axis
Features: Best used for optical axis, car axle whose optical axis is 2mm Application: Gearbox, Capstan, Deceleration pattern in bar Specifications: Material: Plastic Size: 6*8mm (type#1); 6*6mm (type #2) Optional Modulus: 0.5 Package included: 10 x Gear