The product is a set of 10 Yellow Dudley Thunder Hard Core Softballs with a 300 compression hardness. These 11-inch softballs are designed for softball players and are approved for use in USA Softball leagues. The raised seam feature enhances the performance of the ball, making it ideal for competitive play. With a poly center and composite construction, these softballs offer durability and quality for athletes looking to up their game on the field.