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. Ebonite’s best-selling ball last season is back for an encore in a hybrid version featuring HK22. The One Remix produced a lot of backend motion for a solid, without HK22, and was a crowd favorite. With this release, we have cranked up the performance by adding HK22 to the famous GB14.4 cover and Centrex core. Bowlers should have a lot of confidence in this release since HK22 has become the cover standard for performance, and the Centrex core has been inside some of the best balls in history. This One will leave you wanting more! PERFORMANCE:High COLOR: Teal / Graphite / Violet CORE: Centrex Symmetrical Mass Bias COVERSTOCK: HK22 - GB14.4 Hybrid COVER TYPE: Hybrid Reactive FINISH: 500, 1500, 4000 Siaair Micro Pad WEIGHTS: 16-12 Pounds LANE CONDITION: Medium to heavy oil REACTION: Strong mid-lane and backend WARRANTY: Two years from purchase date