The NIB 15lbs Brunswick Ultimate Defender Hybrid Bowling Ball is a high-performance bowling ball designed for medium-heavy lane conditions. Made with a hybrid reactive coverstock and an asymmetrical core, this ball offers excellent durability and smooth motion on the lanes. With a weight of 15 lbs, this ball is suitable for serious bowling enthusiasts looking for a top-quality product. The Brunswick brand is known for its reliability and innovation in the bowling industry, making this ball a great choice for competitive gameplay.