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 900Global Xponent Pearl was designed to expand the 700 Series performance with a superb medium-light oil choice. Featuring the Shrapnel 2.0 Symmetric Core for an early, controlled revving shape, and paired with the handcrafted Reserve Blend 702 Pearl Cover designed to provide extra length on drier conditions. The Shrapnel 2.0 Symmetric Core, previously successful in the XPonent Solid, offers unique RG and Diff numbers, making it an ideal benchmark for reading lanes. Its smooth transition off the pattern makes it an excellent alternative to the Zen Gold Label on dry lanes. The early revving nature balances the clean cover, while the Reserve Blend 702 Pearl Cover, finished with Reacta Gloss, ensures remarkable front-lane length. Perfect for attacking lighter oil conditions and worn lane surfaces, it stands out as a premier option in the 900 Global lineup. Color: Sky Blue/Black All colors do vary somewhat from the picture shown Core: Shrapnel 2.0 Symmetric (14-16#) Coverstock: Reserve Blend 702 Pearl Reactive RG: 2.48 (15# ball) Differential: 0.042 (15# ball) Finish: Reacta Gloss Recommended Lane Condition: Medium Oil