Rawlings 11" Official League Recreational & Practice Softballs are perfect for slowpitch softball games. These yellow, leather balls have a raised seam and are machine-stitched for durability. The core material is cork with a COR of 0.44, making them suitable for recreation and practice. The set includes 4 balls and is part of the Rawlings softball product line. These balls are not vintage and are not signed. They are suitable for team sports and are a great addition to any softball player's collection.