FlexTube makes it easy for you to connect the different levels of your court. What comes up must come down, and with this expansion, you can easily change the direction of your balls. The FlexTube can be easily adapted to 60-degree angles, U-shapes, and S-shapes. Combined with a Starter set, you can also control the speed of the balls on your course. Extra height modules are included in this extension so you can build even higher. How many places on your court can you place your FlexTube? Contents 9 parts: 4 GraviTrax Element FlexTubes (16 building parts = 4 Element FlexTubes), 4 large height modules, 1 guide. From 8 years.