It is a utility model which is used for the sport.It is an elastic rubber band with a length of 80 cm.(Length can be adapted individually for the use) and a diameter of 1 cm.On the left side of the rubber strip, there is a hard rubber ball with a diameter of 7,0 cm. On the ball are located the knobs a length of 0,5 cm, and have to have a diameter of 0,2 cm.On the entire ball to the right and left there are knobs in a distance of 1 cm.On the right side of the rubber strip, there is a hard rubber ball with a diameter of 7,0 cm. On the ball are located the knobs a length of 0,5 cm, and have to have a diameter of 0,2 cm.On the entire ball are located in a distance of 1 cm.The balls are..
展开▼
