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 Cobalt Teal Aqua Pearl Bowling Ball Perfect for new bowlers learning to hook and experienced players seeking dry-lane control, the Brunswick Rhino Cobalt Teal Aqua Pearl is a stylish, high-value ball that delivers smooth motion and consistency. Featuring the proven R-16 Pearl Reactive coverstock, it delivers easy length and a controllable backend reaction without overreacting to oil or dry patches. This formulation is designed for predictability?giving you confidence shot after shot. At its heart is the dependable Brunswick Light Bulb Core, a symmetrical core that creates a stable, consistent roll and enhances pin action. With a 2.52 RG and .030 differential (15lb), the ball offers moderate flare and a smooth transition, ideal for dry to medium oil conditions. Brunswick?s lightweight engineering ensures the same core shape is used from 12LB to 16LB, so bowlers across all weights can expect the same motion and performance. Whether you?re upgrading from a plastic ball or need a versatile dry-lane piece, the Rhino is your go-to. 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 Recommended Lane Conditions: Dry ? Medium Oil Performance Level: Entry Level / Affordable Performance Ball Color: Blue Scent: None Available Weights: 10LB, 11LB, 12LB, 13LB, 14LB, 15LB, 16LB A perfect blend of control, style, and affordability, the Rhino Cobalt Teal Aqua Pearl is a smart addition to any bowler?s arsenal.