The Dunlop ATP Tour 4-Tin contains 18 tennis balls (4 cans of 4 balls each plus 2 bonus balls) and is designed for tournament play. These balls are the official ball of the ATP Tour and provide consistent performance for competitive matches. The 2025 successor model features a high-quality felt covering for durability and optimal spin generation, with a pressurized core that ensures lively bounce and responsiveness. Each can is pressure-sealed to maintain freshness until the first use. The balls meet ITF-approved specifications for weight, size, and bounce behavior. Suitable for hard courts, clay courts, and indoor surfaces, they offer reliable performance for advanced players and club competitions. The packaging is recyclable and designed to preserve ball pressure. Weight per ball: approximately 57 g. Diameter: 6.7 cm. The 2025 edition retains the same core technology as previous models but features an updated felt composition for improved wear resistance.