"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 Ebonite Turbo/R was designed to offer length down the lane with a controlled backend reaction on light to medium oil. The Turbo/R core is surrounded by a GB 10.7 coverstock which is finished with a 2000 Grit Abralon Sanding Pad finish and polished with Powerhouse Factory Finish Ball Polish. Coming in multiple colors, speed past your competitors with the Ebonite Turbo/R! Core: Turbo/R Coverstock: GB 10.7 Finish: 500/2000 Abralon Polished w/Powerhouse Factory Finish Polish RG: 2.59 (15# ball) Differential: 0.035 (15# ball) Hook Potential: Medium Reaction: Length with Controlled Backend Recommended Lane Condition: Light to Medium Oil"

Ebonite Turbo/R PRE-DRILLED Bowling Ball- Purple/Red/Silver (15 lbs)