Easton Arrow Sonic 6.0 340 w/2in Bully Vanes 6-pack. The Easton Sonic 6.0 is a 6mm high-performance hunting arrow engineered with high-performance speed and hunting accuracy in mind. The Sonic 6.0 is built from scratch in the USA using Eastons seamless Acu-Carbon process for 100percent weight and spine consistency from shaft to shaft and from dozen to dozen. Lighter overall mass weight also provides for a wider-range of arrow build options; from light-weight speed setups to high-FOC/high-momentum heavyweights. Sonic 6.0 features another Easton first factory-fletched helical utilizing our 2 Bully vane designed exclusively for Easton by Bohning to provide the utmost in broadhead accuracy. Specifications for Easton Arrow Sonic 6.0 w/2in Bully Vanes: Manufacturer: Easton Fabric/Material: Carbon Length: 31.25 in Diameter: 6 mm Package Contents: Easton Arrow Sonic 6.0 400 W/2" Bully Vanes 6-pack Easton Arrow Sonic 6.0 340 W/2'' Bully Vanes 6-pack