This item includes a free Bowlerstore Rubber Shammy- Colors will vary for the shammy. 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 Hitter lineup has been a staple in the Radical line, offering a highly usable and controllable Asymmetrical ball motion. We are now following The Hitter and The Hitter Pearl with the Power Hitter, which increases the hook potential of The Hitter line. The Power Hitter core features a 2.488 RG, 0.053 DIFF, and an INT DIFF of 0.015, yielding a strong mid-lane and continuous motion. With the addition of the HK22C Textured Hybrid cover, we have enhanced the hook potential, allowing the ball to handle greater oil volumes. Level: Reliable Plus Color: Black/Caramel/Blue Core: Hitter Asymmetric Coverstock: HK22C Texture Hybrid Cover Type: Hybrid Reactive Finish: 500, 1000, 1500 Siaair / Factory Compound Weights: 16-12lbs Warranty: Two years from purchase date RG (16 lbs)2.498 (15 lbs)2.488 (14 lbs)2.504 (13 lbs)2.589 (12 lbs)2.612 DIFF (16 lbs)0.047 (15 lbs)0.053 (14 lbs)0.053 (13 lbs)0.043 (12 lbs)0.043 ASY (16 lbs)0.013 (15 lbs)0.015 (14 lbs)0.015 (13 lbs)0.011 (12 lbs)0.011