The A.D. STARR USA Game Balls Fastpitch Softball is a 11" synthetic cover with safety-core designed for game play. This set includes 4 balls optic yellow in color and feature super raised stitching. Made with a poly-core material, these fastpitch balls are suitable for competitive play and are officially approved by USA Softball. Crafted by the reputable brand A.D. Starr USA, these softballs are ideal for players looking for high-quality equipment for their softball games. Level 1 balls, model # DX1 11SO.