Excalibur ProFlight Illuminated 16.5in Carbon Crossbow Bolts - 3 Pack - Constructed using the highest quality carbon fiber with .001in straightness and +/- 1 grain weight tolerances, ProFlight Arrows will ensure repeatable accuracy which is everything for confidence and success. Equipped with ultra-bright flat-back Lumenoks 3-Pack 250 Grain Arrow weight .001in straightness tolerance +/-1 grain weight tolerance 2in Blazer vane with a 3 degree offset White cresting allows for easy shot placement verification