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. Introducing the revolutionary Columbia 300 Kaboom – more than just an explosion, it’s a game-changer for bowlers seeking top-tier performance without the hefty price tag. At the core of Kaboom lies the innovative Detonate core, boasting a distinctive symmetric shape unparalleled in the industry. Coupled with HK22 featuring Reflex Pearl, this bowling ball delivers exceptional length and a powerful backend, unleashing unparalleled results on medium oil and worn lanes. Get ready for a striking experience like no other with Kaboom! Core - Columbia 300 Detonate Core Coverstock - Columbia 300 Reflex Pearl Reactive RADIUS OF GYRATION: RG (15LB) DIFFERENTIAL: DIFF (15LB) FLARE POTENTIAL - 4-5 inches SURFACE FINISH - 1500 Grit Polish BALL LANE CONDITIONS - Medium Oil
