The Aramith Tournament set features the Duramith technology with its hi-tech engineered molecular structure drastically enhancing the longevity of the balls while signicantly minimizing table cloth wear. With a life-time that exceeds up to 8 times that of the average polyester and phenol-like resins, reaching easily up to 40 years in residential use, Aramith ball sets are the logical choice for both the trade and the player.