On the break, the cue ball can reach speeds of 20 mph in a fraction of a second creating massive surface temperature, which can cause burn spots and table cloth wear. The Aramith Belgian Pool Balls Advantage Value Pack feature the Pro-set of Cast-Phenolic Resin billiard balls which are designed to withstand these high temperatures thus minimizing burn spots and table cloth wear. Also includes a Pro-Cup cue balls, a Rempe training ball, ball cleaner fluid, and a micro-fiber cloth. An excellent value!