Turn any DC generator into a wind turbine with this three-pack of 12-hole crimping hubs. Made from recycled plastic.

This clever, simple hub design allows you to interchange blade sets quickly and easily and or explore the effects of using different blade angles. The hub can be press fitted to the shaft of many small DC generators, attach your own blades and begin experimenting. The improved stainless-steel insert can take a beating in your classroom year after year without failing!