KidWind Gear Set with Spool, Used to increase the RPM of generators to give high power output during experiments, Each

Details:

IIncludes four gears with sizes 64, 32, 16 and 8 teethIncluded hex locks secures to 9/64 in. hex-driveshaft, also used to change gears8-tooth gear fits onto 2mm driveshafts on DC generatorsRecommended for College and High SchoolWarranty and Services5-year limited warranty