Active Myofascia Ball Is A Compact And Effective Tool For Myofascial Release Exercises And Various Techniques To Assist In Equalizing Muscle Tension And Releasing Inter-Connective Tissues Throughout The Body. This Firm Ball Allows You To Target A Small Section Of The Muscle And Penetrate Tissue More Deeply. When Used In Regular Basis You Can Achieve More Relaxed Muscles, Better Range Of Movement And Better Posture. Diameter 6Cm.