This ball ships professionally PRE-DRILLED for your convenience. We?ve simplified the process so you can hit the lanes faster. Based on the ball weight you choose, we?ll drill it to a standard hand size that fits most bowlers in that weight range: X-Small (6lbs): Ages 8 under Small (8?9lbs): Ages 8?11, women?s ring size 8?11 Medium (10?12lbs): Ages 11?15, adult ring size 10 or under Large (13?14lbs): Men?s ring size 10?12 or larger hands X-Large (15?16lbs): Men?s ring size 13+ or extra-large hands Want a different drilling size than standard? Email us immediately after checkout with your order number and your preferred size. Crank up the torque and dominate the heaviest oil conditions with the Storm Ion Max?Storm?s most aggressive innovation in the Ion Series lineup. A powerful upgrade from the fan-favorite Ion Pro, the Storm Ion Max is engineered to conquer demanding lane conditions with next-level flare potential and backend strength. Thanks to its cutting-edge Element Max A.I. Core, this high-performance ball brings over 50% more flare to the table?giving serious bowlers the tools to dig in and finish strong. At its heart is the Element Max A.I. Core, an asymmetrical powerhouse with an added weighted disk that extends mass along the X-axis. This results in a lower RG of 2.47 and a dynamic differential of .055, producing intense flare (4?5") and a quick-revving, high-torque reaction ideal for medium to heavy oil. On the outside, Storm?s trusted NRG? Solid Reactive coverstock ensures consistent traction and unmatched oil absorption. Finished at 2000 Grit, this ball reads early and finishes hard?whether you keep it box-fresh or adjust the surface to match your lane conditions. Its bold Pink, Purple, and White colorway makes a statement before the first frame even starts. Specs at a Glance: Coverstock: Storm NRG Solid Reactive Core: Element Max AI Core (Asymmetrical) RG (15lb): 2.47 Diff (15lb): 0.055 Mass Bias: 0.014 Finish: 2000 Grit Flare Potential: 4?5 Inches Lane Conditions: Medium to Heavy Oil Weights: 12lb?16lb Color: Pink, Purple, White Scent: Strawberry Shortcake Performance Level: High Performance (Storm Master Line) Whether you?re a competitive league bowler or preparing for tournament play, the Storm Ion Max is built for serious control, big hook potential, and lane-dominating power.