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. Storm PhysiX Blackout Bowling Ball ? Unleash Dynamic Power with Surgical Precision The Storm PhysiX Blackout is engineered for dominance in heavy oil. Combining Storm's signature innovation with bold aesthetics, this ball delivers unrelenting performance for bowlers who need maximum hook and aggressive backend motion in demanding conditions. Powered by the Atomic A.I. Core, this asymmetrical engine drives the ball into a fast, controlled revving motion. With an RG of 2.47, a high differential of .055, and a mass bias of .018, the core offers powerful dynamics, strong midlane traction, and devastating continuation through the pins. Wrapped in the NeX Pearl Reactive coverstock?infused with nano technology?the PhysiX Blackout grips the lane with tenacity while maintaining energy for explosive backend movement. Its 2000 Grit Abralon finish creates ideal surface friction, helping it cut through even the most saturated oil patterns with ease. This all-black powerhouse doesn?t just dominate?it does it with style and attitude. With a Pineapple fragrance, the PhysiX Blackout balances intense performance with a bit of playful flair. Specs at a Glance: Coverstock: Storm NeX Pearl Reactive Core: Storm Atomic Core Core Shape: Asymmetrical Core Coverstock Type: Pearl Reactive Surface Finish: 2000 Grit RG (15lb): 2.47 Diff (15lb): .055 Mass Bias Strength: .018 Flare Potential: 5?6 Inches Best For: Heavy Oil Weights: 12lb, 13lb, 14lb, 15lb, 16lb Color: Black Performance Level: High Performance Bowling Balls, Storm Premier Line Scent: Pineapple Brand: Storm Whether you?re looking to take on long oil patterns or simply want a bold, aggressive motion that finishes strong, the PhysiX Blackout is your ultimate companion.