BLACKROLL Fascia Duo Ball 12GERMAN DESIGNED AND MADE BLACKROLL DUOBALL 12 FASCIA BALL Even more effective massage due to the distance between the balls Ideal for the treatment of thoracic and lumbar spine, as the spinous processes are protected by the recess Ideal massager for the thighs, flanks, thoracic and lumbar spine The DUOBALL by BLACKROLL is with a diameter of 12 centimeters not only small and handy, but also incredibly effective. Two fascia balls were skillfully