SportimeMax Tetherball, Multiple-Color The SportimeMax Multi-Color Tetherball comes with nylon rope attached to a durable recessed metal hook. Tetherball is the official size and weight. Max balls have a Cell-U-Lar Rubber Technology top layer with Japanese nylon windings and 70 percent butyl bladders. Soft shock absorbing tip prevents injuries Cellular rubber outer surface for durability Helps improve hand eye coordination Great for preparing young players for the next level of the game