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One disc per order. Unlike cheaply made discs that are flimsy, hard to pump, and lose air quickly, the King Athletic stability balance disk is easy to fill and holds air longer than other discs, even with continual use and extreme pressure.
Inflation – Push the needle firmly and all the way into the disc, please wet the needle and valve prior to inflation. Made from premium materials, the disc is crafted from a high quality, non-toxic and BPA-free rubber composite. Our 13 inch/33 cm diameter disk boost chair comfort with added support and a dual massage surface featuring small bumps and soft spikes.