- Safe and durable design: The baseballs are formed with polyurethane plastic nubs, providing player safety and increased durability over time. - Easy to track during training: The high visibility neon yellow-green color makes the balls easy to follow during drills, helping players improve performance. - Lightweight construction: The lightweight design reduces the chance of impact damage during hitting or fielding practice, allowing players to concentrate on technique. - Pitching machine compatibility: Specifically designed for use with pitching machines, these balls support hand-eye coordination development and are gentle on aluminum bats, dents, or damage. - Various sizes: Available in sizes 22.9 cm (9 inches) and 30.5 cm (12 inches) to meet different skill levels and training needs. Choose the size that fits your practice requirements. - Specifications: Material: PU; Color: Yellow; Size: 9 inches, 12 inches (optional); Diameter: 2 cm (2.8 inches), 9.7 cm (3.8 inches); Weight: 145 g (5.0 oz), 188 g (6.5 oz).