The Champion Sports Exercise Ball Base is a versatile tool that provides extra stability to your exercise ball workout. Suited for balls 65cm and up, this base is a great tool for those new to using an exercise ball. You can also use the base to store a single ball and stop worrying about it rolling away. It also provides a great way to transform your exercise ball into an office chair. This will help you build core strength and better posture while seated in front of a computer. So, outfit your exercise ball and have a tool for success with the Champion Sports Exercise Ball Base.