DUNLOP T624705:SET S-Gut 16G Tennis String Blue Dunlop Sports S-Gut tennis string is a premium, multifilament string delivering all-around playability and durability. Highly elastic synthetic fibers give this string its power, featuring a special PU outer coating for added durability. CONSTRUCTION: Compressed mono-filament central core; Mono-filament Dyna-Tec fiber coil; Highly elastic twisted mono-filament outer wraps with durable PU outer coating. PERFORMANCE SCALE: Power 6, Comfort 7, Spin 5, Durability 7 (1 to 10 scale)