Stability Disc Balance Pad Wobble Cushion Ankle Knee Board Blue Feature: 100% Brand new and high quality. Diameter: about 34cm Load: 500KG A easy-to-use device that can be inflated/deflated to the required thickness to help strengthen and stabilize your ankles, knees, core and shoulders. The disc has 2 surfaces, 1 with dimples and the other with a smoother, slightly bobbled effect which can aid in the massage of the feet. The stability disc is sold as a single item. Helps strengthen and stabilize ankles, knees, core and shoulders. Improves balance, stability and agility. 2 surfaces: 1 with dimples, 1 with a smoother, slightly bobbled effect. Use as an aid to self-massage. Flatter than a balance pad but offers more controlled exercise. Includes Free pump. Package Include: 1 PC Balance pad+Free pump