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 Experience the perfect blend of control and durability with the Storm Mix Urethane Bowling Ball. This 12-pound, 3-piece bowling ball features a low-reaction, U1S1 Pearl Urethane coverstock that offers excellent traction on dry lanes, making it an ideal choice for desert dry conditions. The traditional 3-piece core ensures predictable performance, while the 3500-grit polished factory finish provides a smooth roll. Available in a striking Black/White Pearl color scheme, this ball is recommended for bowlers seeking a colorful spare ball or a reliable strike ball in dry conditions.