When you spend a lot of money on a billiard ball set, you want to make sure you can purchase replacement balls and cue balls – just in case you need to replace a ball down the road.  The Brunswick Centennial replacement cue ball comes with the same processing grade resin as the ball set, including that translucent ivory hue and a blue circle. Plus if the Centennial ball set is the official billiard ball set of the WPBA, you want a cue ball that the pro ladies play with.