This bowling ball ships UNDRILLED with no holes unless you add drilling services. Storm is MIXing it up with the new Storm Mix. This ball is recommended for the bowler who needs a colorful spare ball. Since this is a urethane you may also prefer this ball as your strike ball since it works best on desert dry conditions. Mix things up a little and be the first to own the Storm Mix.The new Mix balls, available in two different colors, expand the Ice line with a new look and feel. The Mix, like the Polar Ice, features a durable U1S first generation urethane coverstock which is more controllable than U2S which powers the popular Natural series. The Mix traditional 3-piece core enhances predictability while the urethane coverstock ensures durability that other materials just cannot offer. And they are available in lighter weights. In addition to the standard 10-16 pound options, Storm is pleased to offer both 6 and 8 pound options as well. Coverstock: U1S Pearl Urethane Core: Traditional 3-piece Factory Finish: 3500-grit Polished Reaction: Low Recommended Lane Condition: Light