TheraBand Pro Series SCP Exercise Balls are high-quality, slow-deflate and used to carry out various forms of exercise to improve body posture, cardio endurance, strength, and balance. They can also be used to reduce or prevent back pain caused by muscle imbalance and a weak core, mainly by targeting movements like push-ups, planks, and sit-ups on an unstable surface. Each exercise ball comes with two plugs and an inflation adapter. Yellow, Red, Green and Blue Balls also come with the TheraBand Exercise Ball Guide Poster detailing 24 Exercise.