Table tennis star
According to the quality index of table tennis, the international table tennis federation divides the ball into three levels. Among them, the highest level is 3 stars. Specific as follows:
Three stars: weight between 2.64 and 2.53g, the roundness error is less than 0.15mm, the hardness number is less than 0.80mm, and the international table tennis federation professional competition specifies the ball.
Second planet: between 2.40 and 2.53g, the roundness error is less than 0.25mm and the hardness number is less than 0.90mm. It is suitable for major domestic competition and professional training of national team.
One planet: between 2.35 and 2.63g, the roundness error is less than 0.25mm, and the hardness number is 1.10mm, which is suitable for the amateur competition or bodybuilding, such as table tennis room, school, army, unit, etc. Table tennis star
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