Newgy Robo-Balls have been selected especially for use with Newgy table tennis robots. Robo-Balls are high-quality balls ideal for recreational play or multi-ball training. Robo-Balls are durable and long-lasting. Available in either orange or white by the gross (144) or dozen (12). 38 mm balls are graded as 1-Star; 40 mm balls as 2-Star.