Easton Axis Shafts 300 1 doz. 219089. Constructed of high strength carbon-composite fibers. Straightness tolerance of +-.003". Available in sizes 700 (6.1 GPI) 600 (7.2 GPI) 500 (8.1) 400 (9.0 GPI) 340 (9.5 GPI) 300 (10.7 GPI) and 260 (11.5 GPI)....