The balance disk is an excellent way to add a new level of difficulty to your workout. The soft disk can utilized in pilates, yoga or regular workouts to work your core muscles, increase balance and stability. Size: 13 1/2" (dia.) x 2 1/2" (H) Material: Soft and pliable PVC Color: Blue Features: * Made of soft, pliable PVC * Comes inflated and can be adjusted easily using a traditional ball pump and needle (needle and pump not included). * Anti-burst can withstand 500 pounds of pressure. * Full-body training tool inflates or deflates for varied levels of difficulty. * Blue inflatable balance disc similar in movement and shape to a fitness ball when used on any seat. * Improves balance and joint stabilization, strengthens & tones core muscles. * Great tool for rehabilitation exercises. This dynamic balance cushion has so many uses. And it adjusts to your current level of fitness. Want to improve balance? To strengthen and tone core muscles? GOGO Balance Disc can be used standing, kneeling or sitting to work on core stability. Get it now, Start your keep-fit.