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Diameter of the ping pong ball should be 40 mm and the weight should be 2.7 gram. The ping pong ball must have 0.4 coefficient of restitution. Depending on the bounce, roundness and consistency of the ping pong ball, single star, two star or three star ratings are marked on the ball. A ball with a three star rating normally implies highest quality ball. www.amworld.info

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13y ago

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