Suitable for all large sitting balls / Made of easy-care plastic, extremely sturdy and able to withstand heavy loads / The ball doesn't roll away when you stand up / Ideal in the office or for storage / / Ball base for added safety Made of high-quality plastic, the ball base can be used for large fitness and sitting balls format. The Sport-Thieme base holds the ball in place, while allowing it to remain mobile for dynamic, sporty exercises. So you can concentrate fully on your exercises. The base can also be used to store your ball or to support a seat ball at the office. Practical notches on the bottom of the base also make it particularly easy to perform exercises with fitness tubes and bands. Specifications ø approx. 45 cm / High-quality polyethylene (recyclable) / Easy-care plastic / Supplied without ball /