TenPoint EVO-X CenterPunch16 Premium Arrows, 6-Pack 16" modulus carbon fiber construction 400 grains +/- 1-grain per arrow weight tolerance 84-grain insert, 17.5% F.O.C. .001" straightness tolerance Inside diameter: .297" Slightly offset 2.1" Q2i Fusion-II vanes White Alpha-Nocks glued in Alpha-Nocks are compatible with any TenPoint, Wicked Ridge, or Horton Crossbow Please note, Vane colors may vary.