No more elusive gym balls! From today your gym balls will have their own specific place and will remain where you have decided to place them thanks to the Stopperball application. Only Tonkey original parts and accessories can guarantee maximum tool performance. The simplest and most economical way to keep gym balls in place, when not in use. It is quickly applied to the ball and can be removed just as quickly. Available in black and in Ø 26 cm (suitable for all types of balls up to Ø 120 cm).