Feature:1. Standard Size: The billiards cue ball with 57.2mm Diameter, meets the national standard, ensuring consistent hitting experience for training and matches, providing excellent performance on the table2. High Durability: Made of high strength resin material, the training cue ball is wear resistant and impact resistant, maintaining its roundness and smoothness even after long term high frequency use3. Precise Balance Roll Smoothly: Each training ball is carefully adjusted in weight and balance, ensuring accurate rolling on the table, reducing deviation and improving hitting accuracy and control4. High Friction Coefficient: The specially treated surface of the ball has a high friction coefficient, helping players better control the movement and force of the cue ball, enhancing training effectiveness5. Cost Effective: Compared to high end competition balls, the training ball offers quality and performance at a more affordable price, ideal for long term use by billiard clubs and individual enthusiasts, high cost performanceSpecification:Item Type: Training Billiards Cue BallMaterial: ResinDiameter: Approx. 57.2mm or 2.25in.Package List:1 x Training Billiards Cue Ball