The Aramith Red Circle billiard cue ball is a 2-14" regulation size training ball. It is crafted from the highest quality phenolic resin which provides exceptional scratch and impact resistance. Each billiard ball adheres to the most stringent specifications in the industry; ensuring superior play-ability and durability.This cue ball is marked with a red circle on the surface of the ball which allows you to check the placement of your chalk mark; there by helping you achieve a consistent cue stroke. Its intended to help players of all skill levels improve their game.