Victor Thruster 220 High Tension Shaft : Graphite + Nano Resin + 7.0 SHAFT Frame : Graphite + Nano Resin + Fiber Reinforced System(FRS) Max Tension : 36 lbs Weight / Grip : 3U / G5 Length : 675 mm FRS Based on the design of multi-layered carbon fiber, the advanced Fiber Reinforced System (FRS) can not only improve the elasticity, but also offer stable controllability with high tension string.