Adheres to the most stringent specifications in to ensure each ball has the right density, balance, diameter, roundness, glossiness, hardness and weight. The cloth wear and white marks that so easily ruin the look of the table are minimized. With colorful spots that will allow you to learn how to strike the cue ball in the same spot, to visualize the rotation of the ball. Features -Color:Assorted Color -Material:Plastic, Iron -Size:5.25X5.25X5.25cm/2.06X2.06X2.06in -Inner Diameter:16mm/0.62in -The ball is precision engineered for perfect roundness and balance, ensuring play ability and durability. -Made of good and anti-wear material, scratch and impact resistance, you can use it for a longtime. -Help you learn how to strike the ball in the same spot, to visualize the of the ball. -This standard training cue ball can help you greatly improve your billiard skills. -The billiard ball is great for game rooms, bars, sports match, and players at all skill Package list: 1 x Billiard Training Ball 1 x Base