The squeezable stress balls are made of polyfoam material, reliable and not easy to fade or break, you can relieve the pressure by pinching as hard as possible, giving you a good feel. These stress relief ball designs are available in many different colors and you can also choose different colored balls to match diverse occasions. It is ideal for stress relief and relaxation, also helps people recover and strengthen their hands when using a computer regularly. Great for gifts to colleagues, family or decorations. 2 3/4" D