This is a four foot hardwood longboard I built. There is a Maple stringer that runs through the middle of the entire board. On the top of the board there is a combination of Redheart and Oak. On the bottom there is a combination of Mahogany, Cherry, and Walnut. The combinations of the top are mainly aesthetic. While the combinations of the bottom are specifically chosen to give the middle of the board strength while providing more flex in the sides for carving.