172 elastic stereo massage floating point, direct act on the pain and discomfort part. 2Stainless steel shaft, strong and durable with built-in steel axle, flexible rolling. 3Environmentally friendly EVA material is safer to use, full of flexibility and strength. 4Suitable for arms, head, neck, waist, shoulder, leg and other body part massage. 5Can be used before or after sports, prevent injury and relieve fatigue.