The gears are made from solid mahogany, oak, cherry and maple hardwood and the base from laminated birch with a walnut top. The gears have a tough lacquer finish while the sliding surfaces are finished in a non-toxic low friction oil. The gears may be moved around on the board, with dozens of combinations being possible. As the student manipulates the gears a basic understanding of gears follows. The base is 1" thick while the board is 10"x12". This set includes 4 gears.
Gear Board Set
Please allow 1 week for product to be made and shipped