Tennis strings Signum Pro Tornado 1.17

Its 7-sided, twisted Heptagonal profile offers players great potential for transmitting slice and lift. This "twist" technology softens the string and makes it easier to play. Power is also very important, and is associated with good ball control. The string has a long service life.
Co-Polyester monofilament with Heptagonal and twisted profile Product highlights : spin - power - control