Ball Storage Stackers are a convenient way to store stability balls. Simply fasten each stacker with the Velcro attachment to form a circular stacking ring. Stackers can be adjusted to hold a 45 cm to 75 cm stability ball. Sold in a set of three. Stability Balls are sold separately. Features: Stackers adjust to hold 45 cm to 75 cm stability balls. Pliable PVC. Color: Clear. 52" L x 6" H (unfastened). Fastens together with Velcro. 3 stackers come in one set.