Push the limits of speed and accuracy with Easton Archery???s Sonic 6.0 Arrow Shafts! They utilize Easton???s exclusive Acu-Corbon manufacturing process, a proprietary method that delivers 100% weight and spine consistency. The Sonic 6.0 Shafts feature a lighter overall mass weight ??? this provides the user with a massive assortment of arrow build options, from lightweight speed setups, to high front-of-center/high-momentum configurations. Other features of the Sonic 6.0 Arrow Shafts includes 6mm ST inserts (18 grains) and pre-installed 6mm nocks. In addition, the Sonic 6.0 Shafts come factory-fletched 2?g Bully helical vanes to provide outstanding broadhead accuracy. Features: Manufactured with Easton???s Acu-Carbon manufacturing process Lighter overall mass weight ??? wide choice of arrow build options 6mm ST inserts (18 grains) Pre-installed 6mm nocks Factory-fletched with 2?g Bully helical vanes Easton Sonic 6 Size 340 Shafts 60pk 230633 in Black