Based on the Centripetal™ core, the Centripetal HD core with adjusted specific gravity is matched with a new AI outer core. This results in a more powerful roll and the best pin action. It also inherits the strengths of the conventional core, offering high straightness and the ability to adapt to lane changes, making it an attractive ball. It exhibits a hooking motion that is between a sharp break and an arc-shaped curve. Normally, ball numbers vary depending on the weight, but this "Summit" has been improved to have similar numbers. Furthermore, the coverstock "TX-23™ Hybrid Reactive" allows for use in a wide range of conditions. It also has high rolling durability, creating the best pin action. Core: Centripetal HD - A.I. Coverstock: TX-23 Hybrid Reactive Recommended Lane Conditions: Medium, Medium Heavy Thank you for viewing.