Circuit Training Class Packs make ordering easy. Enough for 9 students. Pack includes exercise tubes of varying resistance and 2 kinds of Hot Spots™. Big Ball Caddy available separately. Pack includes: • 9 18" Anti-Burst balls • 2 light resistance tubes • 5 medium resistance tubes • 2 heavy resistance tubes • set of 12 Exercise HotSpots • set of 12 Tubing HotSpots