"The original exercise balance device DynaDisc is an inflatable balance cushion (supports up to 2000lbs/sq. inch) that is smooth on one side and textured with pegs on the other. The Dyna Disc can be used for Core Exercise balance training strength training and rehab. Use Dyna Disc seated to give you benefits similar to a Gymball standing to increase balance and muscular resistance while doing exercises or lying to improve strength and core stabilization for floor exercises. Vary inflation to change the degree of difficulty. Dyna disc improves posture alignment and creates a more challenging workout in less time. And DynaDiscâ¢ comes with a complete satisfaction warranty and industry leading two-year guarantee. Specifications:
14 inches in diameter
Unique beveled edge supports comfort to the hamstrings
Made of the same material as a gymball
Inflate with a traditional ball needle
2 000 pounds per square inch
Color: Royal Blue"