Power Systems Flat Agility Rings, 19-Inches Each, 12-Pack, Orange (30745) Develop foot speed, agility, overall coordination, and mental focus 1/16th inch thick rings are ideal for indoor surfaces Set includes 12 19-inch diameter, lightweight rings High-impact PVC rings are also flexible Exercise training aid for speed, agility, strength, power, running, football, volleyball, basketball, baseball, soccer and all other athletic, fitness, weight, or cross training