AMERICA'S #1 BEST-SELLING TENNIS BALL: Penn Championship is the top choice for everyday players, clubs, and coaches—trusted for consistent quality, durability, and performance across all court types. EXTRA DUTY FELT FOR HARD COURTS: Made with long-lasting Extra Duty felt that withstands abrasive hard-court surfaces. Ideal for frequent play, training sessions, and long rallies. RELIABLE BOUNCE & FEEL: Pressurized construction provides a lively, predictable bounce and steady playability, helping maintain consistent performance throughout the match. USTA & ITF APPROVED: Officially approved for league and tournament use. Suitable for competitive matches, practice sessions, and recreational play. VALUE PACK - 36 TOTAL BALLS: Includes 12 cans of 3 balls each, giving players, coaches, and clubs a cost-effective, durable supply for matches, lessons, ball machines, and training drills.