Excalibur ProFlight Crossbow Bolts 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 ProFlight Crossbow Bolts: Manufacturer: Excalibur Crossbow Color: White Black Features of Excalibur ProFlight Crossbow Bolts: High quality carbon fiber .001" straightness 1 grain weight tolerance Compatible CeaseFire Technology crossbows or any that utilize flat-back nocks Package Contents: Excalibur ProFlight Crossbow Bolts Excalibur 22EXP18-6: ProFlight Crossbow Bolts Black/White