Great for club and advanced level of play by offering superior fidelity and greater attention to detail, the Head XT tennis ball is designed for the most demanding type of competitiveness and extensive practice at high level. The ball delivers fantastic bounce, increased responsiveness and enhanced durability, and furthermore there is the (EN) Core technology that provides better resistance to hot weather conditions. The ball is suitable for both hard courts and clay surface, and its shipped in bulk 12 dozen.