Feature●Wear the headband over your head and take the rope length as long as your arm.●3 kinds of balllet balls: weight 20g●Black Ball: Weight: 0.7 oz (20 g).●Tennis Ball: Weight 2.4 oz (65 g).●Material: Silica Gel, Weight: 1.1 oz (30 g).Description
Headband Material:Silica Gel
Ball Material: PU & Polyester
Diameter: Approx. 2.5 inches (6.3 cm).
Color: Red & Black & Yellow