The head runs! The load during the swing changes depending on the position of the weight ball for tennis rackets. Just attach it and shake it to increase power and head speed. Perfect for warming up!
Product model number: WI-120BL Color: Blue Size: FF Material: Plastic, rubber Type: Tennis Batteries included or built-in: No Package size: 15.1 x 13.9 x 8.3 cm; 108 g Suitable for: Unisex (Adult)
