The Aramith Tournament Championship 2 1/16 inch (52mm) tri-billiard balls have enjoyed a legendary reputation for outstanding endurance and uncompromised quality. The Aramith Tournament Championship 2 1/16 inch (52mm) tri-billiard balls are the only one in the world made of pure phenolic resin, making them last up to 5 times longer than other balls made from polyester or other polymers.The extra hard vitrified phenolic surface of the Aramith Tournament Championship 2 1/16 inch (52mm) tri-billiard ball sets drastically reduces wear and burn spots on both the balls and pool table cloth, guaranteeing the lowest cost over time. These premium quality Aramith Tournament Championship 2 1/16 inch (52mm) tri-billiard ball sets include one white cue ball, one orange and one red target ball.