Product Description The KR Strikeforce Lucky Shamrock Bowling Ball is a custom-made polyester bowling ball designed for both recreational bowling and display, featuring a vibrant shamrock design that showcases a bold, Irish-themed aesthetic. Crafted from 100% polyester with a plastic coverstock, it delivers a straight, predictable roll, making it an excellent choice as a spare ball for bowlers of all skill levels on any lane condition. Available in weights ranging from 8 to 16 lbs, this USBC-approved ball is built for durability and precision.Undrilled Bowling BallPerfect For All Ages: Available in 8lbs, 10lbs, 12lbs, 14lbs, 15lbs, and 16lbsPolyester Design: This bowling ball is made out of polyester, making it a great option for recreational and beginner level bowlers. It also makes for a great spare ball for more competitive bowlers.USBC Certified: This bowling ball is USBC certified, allowing you to use it in your leagues and tournamentsColor: Multi *Please note that colors may slightly vary from image shownCoverstock: PolyesterWeight Block: Traditional 3-PieceFactory Finish: High Gloss PolishFlare Potential: 1″ (Low)Radius of Gyration (RG): HighDifferential (Diff): LowIntermediate Differential (Mass Bias): 0.000