This machine is all hand made from the following woods, maple, walnut, canary, and padauk. It features a marble gear lift, and a marble pump. As the marbles climb the staircase they will take one of two paths. The first path is the fast track to the circular dish below. The second path will take three ramps that lead back to the marble pump. It's fun to play with and makes for a great conversation piece! Dimensions are 23"w x 21"d x 20.25"h.