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SG Ultra is often used in hybrids with polys such as Flash or Pro X or with nylons such as Impulse and Evolution for remarkable touch
The Kirschbaum Black Shark tennis string is equipped with an octagonal teeth profile parallel to the string
with improved extrusion process you will find better tension maintenance
this poly string is designed to provide a stiffer option than the Flash string
A great string in the full and hybrid setups
Kirschbaum Pro Tour Control Tennis Racquet String, Reel 660ft/200m (co-polyester) Color:Gray Ivory SG Ultra is often usedKirschbaum Pro Tour Control co polyester monofilament with a pentagonal profile. Pre stretched with TFT (Thermo Fusion Technology) developed by our technicians which guarantees a longer life by reducing tension loss. Recommended for players with powerful strokes looking for spin, control and good durability. Made in Germany, Since 1987.