The Ebonite Gyro Balanced Gyro I Bowling Ball is a vintage, high-performance, ten-pin bowling ball designed for competitive play. Weighing 11.13 lbs., this ball features a unique black/brown swirl color and is made of durable urethane material. It is branded by Ebonite and approved by the United States Bowling Congress (USBC). Perfect for bowling enthusiasts looking for a reliable and balanced ball to enhance their performance on the lanes.