AmazonBall Weight (g): 2.50-2.80, lightweight Ball Diameter (mm): 40 mm Long-Lasting: the impact of not less than 1000 times, no cracks Applicable: Suitable for multi-ball training, schools,Table Tennis Arena,beginners , table tennis robots,and other training balls Hardness: 0.55-0.65mm
Ball Weight (g): 2.50-2.80, lightweight Ball Diameter (mm): 40 mm Long-Lasting: the impact of not less than 1000 times, no cracks Applicable: Suitable for multi-ball training, schools,Table Tennis Arena,beginners , table tennis robots,and other training balls Hardness: 0.55-0.65mm