About this item This fits your . Make sure this fits by entering your model number. Used for exercise balance training, yoga skills and physical training. Also can be as foot massage ball, improves blood circulation and increases the feel of the feet. Yoga massage ball, high density portability, make muscular relaxation. The surface of the sphere is soft and moderate, massage your skin, stimulate nerve endings, promote blood circulation, relax nervous nerves, enhance your flexibility. 4 different colors for you to choose, meet your different needs. Place it on the muscles (back, legs, waist, etc.) for a good massage to relieve muscle soreness.