Alien Brand Black Diamond is a blended polyester string that provides
exceptional power and control with a crisp feel. The strings soft outer core
grips the ball generating tremendous spin and its linked molecular chain
makes it one of the most durable strings on the market today. Black Diamond
is engineered for maximum playability and provides a softness that is easy
on the arm. Many top ranked players have switched to this string including
the # 1 ranked junior player in the US.