The 15lb Roto Grip Rock Star Amped XBLem Bowling Ball is a high-performance bowling ball with a NanoStar Pearl Reactive coverstock in a Chili/Maroon/Rasberry color. It features a Symmetrical core type and a differential of .050, making it suitable for medium-heavy lane conditions. This Ten-Pin Bowling Ball is undrilled, allowing for customizable drilling options. It comes with a 1-year manufacturer warranty and is part of the HP3 product line. Made in the United States, this bowling ball is designed for serious bowlers looking for top-tier performance on the lane.