This product is 16" tall and 11" wide. It comes with steel ball bearings: 5x1", 1x3/4", 1x1/2". This is to help inventors do their own inventing and prototyping. The number of weights at the bottom can be changed from 1 to 4 ball bearings. That will change the configuration which will result in a different outcome. Also, the ball bearing up on top can be changed from 1"-3/4"-1/2". That will also change the outcome as well. The goal here is to test and see which configuration allows the pendulum to run the longest. There's also a shaft and two low friction bearings, a stand, and a bottom support. The product may slightly vary from the images.