Gamma's new and improved TNT 2 Technology provides the greatest combination of power and control offered in a premium tennis string. This new second generation Thermo Nuclear Process allows for greater dynamic elasticity and string bed deflection to cushion the impact and store more energy in the strings. TNT 2 also maximizes the dynamic resiliency to provide maximum power, enhanced control and less shock. String is brand new, but may be bulk clear packaging w/o the colored insert. Natural Color. Black no longer avail.