The NIB 15lbs Storm Identity Pearl Bowling Ball is a high-performance Ten-Pin Bowling Ball designed for competitive play. Made of polyester with a Pearl Reactive coverstock, this asymmetrical core ball offers a .055 differential for optimal performance on the lanes. Manufactured by Storm, a trusted brand in the bowling industry, this polished ball comes with a 1-year manufacturer warranty and is undrilled, ready for customization. With a weight of 15 lbs and a USA Bowling Congress (USBC) association certification, this bowling ball is a top choice for serious players looking to enhance their game.