It is designed for achieving agility, cardiovascular endurance and total body conditioning. Equipped with a high-density plastic base and a high-end shock-absorbing PU perforated ball for long-lasting durability, it is mounted on a strong steel spring so it will bounce back at you to provide resistance designed to improve your hand-eye coordination, timing and reflexes. The ball is 24cm x 18cm, which is a better target size for mastering these shots. Adjustable height is between 160-220cm, allowing you to adjust to the optimal height for precise training.