Gamma TNT2 15L Solid Core Synthetics. Provides even more power and control with less shock and a more lively feel.TNT2 processing enhances playability, durability and control for all playing styles. Elastalon center core and outer wraps with a Pearl coating to enhance durability. Technology Thermo Nuclear Technology 2: Gamma's new and improved TNT2 Technology provides the greatest combination of power and control 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. TNT2 also maximizes the dynamic resiliency to provide maximum power, enhanced control and less shock than all other racquet strings including natural gut.