Aramith 2 1/4" Regulation Size Professional Billiard Pool Balls Complete billiards ball set; includes 7 striped numbered balls, 7 solid numbered balls and 1 aramid Pro cue ball with Red Insignia Standard size: 2.25 inch balls Perfect roundness and balance, uniform weight and hardness provide friction resistant roll and reaction Aramid phenolic resin balls last up to five times longer than balls made from polymers For decades, aramith billiard balls have had a legendary reputation for outstanding endurance and uncompromised quality