- Official-standard size and weight: matches official standard size and weight; circumference approximately 9 inches; diameter approximately 2.8 inches; weight suitable for all drills and real-game scenarios. - Excellent resilience: built with a rubber core and durable PVC outer shell to deliver consistent performance and withstand intensive training and frequent use. - Efficient learning: features a colorful fingerprint marking system to guide grip for different pitches, including fastball with four stitching, fastball with two stitching, curveball, slider, and more. - Universal training solution: designed for everyone; suitable for left- and right-handed throwers; grip-friendly fingerprints for every player. - Use scenarios: - Solo practice at home or in a net to drill grips and mechanics. - Team bullpen or warm-up sessions to reinforce grips for common pitches. - Beginner training to learn multiple grips before live-game play.