Not all 3-Star balls are created equal. An International Table Tennis Federation Approved (ITTF) 3-Star rating is the highest grade a ball can receive. The ITTF Approved Butterfly 3-star balls go through a more scrupulous quality control as variations of tolerance are the strictest. It will be free of soft spots and the most consistent in roundness and weight. Look for "ITTF Approved 3-Star" to ensure that your match play ball is of the highest quality.