Click the button below to add the Gear Pack - 20mm, 18-tooth ** to your wish list.
Fits 1/8 in. or 3mm diameter axle. 10/pkg. Works with other gears marked **.
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All prices are in USD. Registered Trademarks of KELVIN L.P include, but are not limited to: KELVIN®, Hands-On Science®, Build A Better Mousetrap Racer®, Rat Racer®, And the Winner Is…®, New Standards®, and SUMO Car Wrestler®.|