Tourna Big Hitter Black Zone 16 tennis string delivers incredible comfort and control. Its extremely durable and smooth. and wont bite into softer strings to cause premature breaking. The smooth surface allows the strings to bend upon impact and then snap back into place for excellent feel. power and spin.

• Ideal for faster swing speeds.
• Perfect for hybrid setups.
• Uses a series of special thermal heat treatments for strength and a smooth surface.