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. Brunswick Rhino Red Black Gold Pearl Bowling Ball The Brunswick Rhino Red Black Gold Pearl is a bold performer crafted for entry-level bowlers and seasoned players seeking a dry-to-medium oil lane solution. Designed with Brunswick?s R-16 Pearl Reactive coverstock, this ball delivers effortless length and a strong yet controllable backend reaction?ideal for learning to hook or refining your precision game. Inside, the proven Light Bulb Core provides reliable motion and impressive pin carry. With an RG of 2.52 and a diff of 0.030 (in 15LB), the Rhino creates moderate flare for a clean, consistent read of the lane. The 500-grit polish finish enhances its performance on drier conditions, while the striking red, black, and gold colors make it stand out on the lanes. Each weight from 10 to 16 pounds uses Brunswick?s smart lightweight core engineering, ensuring consistent reaction across the entire weight range. Technical Specs: Brand: Brunswick Coverstock Type: Pearl Reactive Coverstock Name: Brunswick R-16 Pearl Reactive Core Shape: Symmetrical Core Core Name: Brunswick Light Bulb Core RG (15LB): 2.52 Differential (15LB): 0.030 Mass Bias Strength: N/A Flare Potential: 2 ? 3 Inches Surface Finish: 500 Grit Polish Lane Conditions: Dry ? Medium Oil Performance Level: Entry Level / Affordable Performance Color: Red, Black, Gold Available Weights: 10LB, 11LB, 12LB, 13LB, 14LB, 15LB, 16LB Scent: None Perfect for bowlers just starting out or looking for a dependable strike ball for lighter oil conditions, the Rhino Red Black Gold Pearl combines style with smart performance.