Yonex RQiS 1 Tour XL 100 Tennis Racquet Grip, 4 3/8 Achieves both enormous power and manoeuvrability. The O.P.S. Shaft gives advanced players more repulsion power and a positive holding feel. "Cup-Stack (CS) Carbon Nanotube" is a new structural form of Nanotube which has both flexibility and strength. Both power and manieuvrability are increased signifigantly by positioning the CS Carbon Nanotub throughout all parts of the racquet. RQiS 1 TOUR XL contains "Cup-Stack Carbon Nanotube" which has restoring force throughout all parts of the racquet frame. It achieved both enormous power and manoeuvrability with the higher flexibility and the holding time created when hitting the ball.