The ashaway powernick 19 is the thinnest squash string ever and features only 105mm diameter to provide excellent power and ball control the string offers zyex monofilament construction that prevents tension loss outer spiral braid for good gripping action that improves spins and slices and proprietary outer coating for improved stringing and increased durability the string is used by the worlds top player david palmer and is recommended for both amateur and professional players looking fo