#1 SELLING BALL: The product of decades worth of testing and perfecting; Penn Ultra Blue is the best selling racquetball ball in the world. MAXIMUM VISIBILTY: Penn racquetballs feature a bright blue hue for superior visibility in all indoor and outdoor play conditions. CONSISTENT PLAY: Players all over the world choose Penn time and time again for reliable bounce and play not found in any other racquetball. PLAYERS OF ALL SKILL LEVELS: From beginners to future IRT pros, Ultra-Blue is a great all-around ball for players of any skill level. PENN DURABILITY: Durable rubber ensures the all courts racquet balls will play like new for as long as possible.