Check the listing for details. Billiards Cue Ball Practice Training Artifact, Used in American Billiards Eig.... Condition: New. Listed at 33.87 USD. Product description Specification: Condition: 100% Brand New Item Type: Billiards training cue ball Material: High quality phenolic resin Color: As picture shown Product diameter: Approx. 57.2mm/2.3in Weight: Approx. 170g Fitment: for America pool eight ball. Package List: 1 x Cue ball This billiard cue ball is made of High quality phenolic resin material, which is resistant to wear and impact. Product diameter Approx 57.2mm/2.3in，Weight Approx 170g，The billiard cue ball is light in weight, small in size, easy to carry and easy to use. Double-sided design, suitable for people with different needs at different stages, suitable for beginners and advanced players. This is a professional training ball You can observe which point of hitting the mother ball will make it rotate.You can cultivate your own awareness of hitting point to find the angle between the ball and the rebound on the platform. This is a professional training cue ball with scientific and precise point division. By observing the impact point, you can know more clearly which point will rotate it, as well as the angle and direction of rotation. Through continuous practice, cultivate your own awareness of the shot point.