●Premium Material: The AAA Grade pool cue ball is made from quality polyester resin with exceptional scratch and impact resistance, more durable, with longer lasting gloss shine. ●Design: The magnetic pool cue ball is precision engineered for perfect roundness and balance, ensuring superior playability and durability. ●Size: The cue balls for pool measure 2.25"/57 +/- 0.15mm in diameter, and 6oz/168 +/- 3grams in weight. ●Magnetic Ball: The magnetic ball has a ferrous core that automatically separates from the other numbered balls. ●Applicable: Used on most coin-op pool tables. Great for game rooms, bars, sports matches, leisure exercise, and players at all skill levels to billiard practice.