The Tecnifibre X-R3 1.30 tennis string is ideal for players looking for a firm feel, enhanced comfort & maximum power. This multifilament string features three monofilament cores that have proven to provide a firm feel, increased control & enhanced durability. The string also composes of Elastyl fibres that enhance power & Polyurethane 400 inside that improves comfort by reducing shock & vibration. In addition, the string is coated with Silicone Pyrogene Lubritec that enhances durability. The Tecnifibre X-R3 has a 1.30mm gauge & is available in a 12.2m (40ft.) set.