The Tecnifibre X-R3 1.25 tennis string offers a firm feel, maximum comfort & power. This multifilament string is constructed of three monofilament cores, PU 400 inside & Elastyl fibres. The monofilament cores increase control & provide a firm feel, the Elastyl fibres enhance power, & the Polyurethane 400 inside provides more comfort by reducing shock & vibration. The string is coated with Silicone Pyrogene Lubritec that enhances its durability. The Tecnifibre X-R3 has a 1.25mm gauge & is available in a 200m ((656ft.) reel.