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most wire sizes
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Kids assemble the components
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Large Plastic Project Wheels and Axles (50 pcs) MCF most wire sizesIdeal for science and engineering projects, these wheels are designed to make your rubber band powered vehicles and mousetrap cars perform the way you expect. The wheel axle hole has 4 teeth to grip the included 6 x 1 4" dowels, preventing slippage. Rubber bands add traction to the outer wheel. Extra dowels and rubber bands included. Easy to work with! If you have built a car project with CDs for wheels, you know what a hassle that is. These wheels