The Butterfly 144 Ct. Training Table Tennis Balls are perfect for practice sessions and robot training. Choose between white or orange balls and start improving your serves and rapid movements. These balls are USATT approved. Over the last 40 years, Butterfly has established a reputation of providing the best in table tennis equipment. Butterfly believes this commitment to the sport of Table Tennis, and its growth, is essential to the maturation and recognition of the recreational market worldwide. Butterfly boasts a full line of paddles, balls, tables, shoes, and bags. Driven by variety and quality, Butterfly and its products are recognized by most major table tennis organizations and worldwide championship tournaments. Often named as the official table, Butterfly tables meet all regulations and requirements of the sponsoring organizations. * 144 training balls * Diameter of 40 mm * Ideal for practice sessions * Great for club play * Free shipping * USATT approved * Available in variety of colors