Carbon express xbow arrow 20" mayhem moon nock 6pk FEATURES-20" arrows-Fletched with 3" vanes-420 grain-0.348" diameter-Precision sorted for straightness to +/- 0.004"-K-360 Weave Technology integrates a carbon weave into the outer layer of the bolt for added strength & spine consistency-6 pack includes inserted moon nocks, plus 6 universal flat nocks Other Features: Engineered w/advanced carbon materials for superior spine consistency,speed,accuracy,& penetration,precision sorted for straightness multi-layer construction for optimal size diameter & down range accuracy & penetration with broadheads,also includes 6 flat nocks