Callaway Personalized Tour ix Golf Ball Simply put, Callaway Golf engineers have re-invented tour golf ball performance. The Tour ix Golf Ball is the most technologically advanced and longest tour ball you've ever played. The breakthrough in distance comes from innovative 4-piece inertia technology. A tungsten-infused outer core shifts weight away from the center of the ball, reducing driver spin for maximum distance and straighter shots. The soft core formulation provides tour-level feel and the urethane cover generates excellent short-game spin. A refined HEX Aerodynamics pattern further increases distance through reduced drag and better stability. Four pieces, two cores, one unbeatable ball. Personalize your golf balls! Choose from blue, black, red or green ink. Up to three lines of text; text is limited to 17 characters per line, including spaces and punctuation. No profanity accepted.