Track continues the popular Kinetic series in the Track Kinetic Amethyst. This ball features the modified Kinetic core which has a low RG, medium differential, and low mass bias. These components allow this ball to save its energy longer but use it quicker. Track has combined this core with the QR-6 Pearl coverstock which gives length with a quick reaction to friction. With a 500/1000 grit polished finish this ball is recommended for medium oil patterns. This mid performance ball with a mid performance price and an asymmetric core is hard to beat.