This bowling ball ships PRE-DRILLED. There are 5 sizes and the sizes that we drill are based on the weight of the ball. X-Small: 6lbs- Ages 8 and under, Small: 8lbs and 9lbs- Ages 8-11 and womens ring size from 8-11, Medium: 10lbs, 11lbs, and 12lbs, Ages 11-15 and Adult Ring size 10 or lower, Large: 13lbs and 14lbs, Mens ring size 10-12 or people with larger hands, X-Large: 15lbs and 16lbs, Mens ring size over 13 or people with extremely large hands. If you would like a different size drilled for the weight you selected, you must contact us via email as soon as your order is placed with your order number. Pre-Drilled bowling balls cannot be returned or exchanged. The Emerge was one of the year’s most underrated bowling balls. Our pros turned to the Emerge when they needed a big asymmetric pearl that handled some oil and didn’t quit on the backend. The strong asymmetrical core design combined with HK22 created a ball that could handle decent volumes of oil but, most importantly, a ball that created a sharp change of direction at the back end. We have amped up what was great about the Emerge by adding solid to the pearl cover for a hybrid version. With its hybrid coverstock, the new Emerge provides a ball that creates more traction in the mid-lane and more overall hook potential compared to the original. Color: Black/Teal/Blue Performance: Pro Coverstock: HK22 - Optimize Hybrid Weight Block: Emerge Factory Finish: 500, 1000, 1500 Siaair / Factory Compound Flare Potential: High Radius of Gyration (RG): 16lbs - 2.520; 15lbs - 2.510; 14lbs - 2.537 Differential (Diff): 16lbs - 0.046; 15lbs - 0.053; 14lbs - 0.054 Intermediate Differential (Diff): 16lbs - 0.018; 15lbs - 0.021; 14lbs - 0.019 Reaction: Strong mid-lane and backend Warranty: 2 Years from Purchase Date