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 Mix Black Purple Pink Bowling Ball Whether you're just starting out or need a reliable spare shooter, the Storm Mix Black Purple Pink is the perfect companion for straighter shots and maximum durability. Designed with Storm?s tried-and-true Traditional 3-Piece Core, this ball delivers exceptional predictability, making it ideal for beginners and pros alike. The U1S Solid Urethane Coverstock is Storm?s most durable shell to date?built to resist chips, cracks, and wear far beyond traditional polyester balls. With a polished 3500 grit finish, the Mix glides easily over drier lane conditions and stays straight, making it your go-to for spares or dry lane play. Its vibrant Black, Purple, and Pink color scheme adds a fun edge to your arsenal, while the minimal flare potential (0?1") ensures true roll control. Technical Specifications: Brand: Storm Coverstock Type: Urethane Coverstock Name: U1S Solid Urethane Core Shape: Symmetrical Core Name: Traditional 3-Piece Core RG (15LB): 2.69 Differential (15LB): .006 Mass Bias Strength: N/A Flare Potential: 0 ? 1 Inches Surface Finish: 3500 Grit Polish Lane Conditions: Dry ? Medium Oil Performance Level: Entry Level / Spare Ball (Storm Ice Line) Color: Black, Purple, Pink Available Weights: 6LB, 8LB, 10LB, 11LB, 12LB, 13LB, 14LB, 15LB, 16LB Scent: None Straight, durable, and dependable?the Storm Mix is your go-to for consistency and control.