The Luxilon 4G S 141 tennis string set is 12.2m (40ft) long, which is enough to re-string one racket. The string is an effect of Luxilon's two-year efforts to adjust the molecular properties of 4G in order to extend the life of playability. It provides a higher than average comfort when compared to other monofilament strings & offers a good level of comfort without sacrificing tension maintenance. This long-lasting co-polyester string also delivers supreme durability & is best suited to rackets with an open string pattern & players with long strokes. It has a gauge of 15 (1.41mm).