Excalibur Crossbow ProFlight Illuminated Crossbow Bolts 16.5 in 3 Pk Black/White. 001? straightness and +/- 1 grain weight tolerances the ProFlight Arrows will ensure repeatable accuracy which is everything for confidence and success. Specifications for Excalibur Crossbow ProFlight Illuminated Crossbow Bolts: Manufacturer: Excalibur Crossbow Color: White Black Features of Excalibur Crossbow ProFlight Illuminated Crossbow Bolts: High quality carbon fiber .001" straightness 1 grain weight tolerance Package Contents: Excalibur Crossbow ProFlight Illuminated Crossbow Bolts Excalibur Crossbow 22EXP16IL-3: ProFlight Illuminated Crossbow Bolts 16.5 in 3 Pk Black/White