●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 billiard cue ball is precision engineered for perfect roundness and balance, ensuring superior playability and durability. ●Size: The cue balls for pool measure 57 +/- 0.15mm in diameter, and 168 +/- 3grams in weight. ●Replacement Cue Ball: Replace your dull, lost, or worn pool ball. ●Product Help: If you have any question while using this product, please contact our customer service directly.