The Penn Championship Extra Duty Tennis Ball is America’s #1 selling tennis ball for a reason. Engineered for players who demand durability and consistent performance, these pressurized balls feature Penn’s well-known Extra Duty felt, designed specifically for hard courts. The durable felt resists wear and maintains a strong bounce over time, making it ideal for players who hit frequently and play long matches. Perfect for both competitive and recreational players, Penn Championship balls are USTA- and ITF-approved, ensuring high-quality performance for league play and tournaments. This convenient 36-ball value pack includes 12 cans of 3 balls each—great for coaches, clubs, ball machines, and players who want a dependable supply. Whether you're practicing your serve, playing a weekend match, or stocking up for the season, Penn delivers the performance and reliability players trust.