EASTON 6.5 HUNTER CLASSIC SHAFTS 300 1 DOZ. The 6.5 shaft uses proprietary Acu-Carbon Uniform Spine process. Acu-Carbon is a continuous-fed, single-die manufacturing method that results in the most reliable tolerances and eliminates the need for the spine-alignment and weight sorting. Easton’s Acu-Carbon production line produces the most consistent spine and weight. Comes with pre-Installed Microlite nocks.