TheraBand Exercise and Stability Ball Stackers for Storage of Stability Balls, Exercise Balls, Yoga and Pilates Balls, Physical Therapy Equipment, Training Equipment, Fitness Class Equipment, Set of 3 Set of three clear, high-quality ball stackers best used to stack three exercise and stability balls on top of one another for easy storage Great for keeping fitness balls off the ground and away from dirt, debris, and unnecessary rolling Three clear plastic cylinders with basic design Economical choice for easy storage without unnecessary and bulky equipment Compatible with all TheraBand Pro Series and Standard stability balls and any exercise ball measuring 45 cm to 85 cm in diameter