Diablo carbon arrows are specifically designed and spined for use in Excalibur’s Matrix Series Crossbows and the speed they produce.18? Arrow Length250 grain arrow weight.003 straightness tolerance2? Blazer vane with a 3 degree offsetEquipped with Rhino NocksCompatible with CeaseFire Technology crossbows or any that utilize flat-back nocks Excalibur Diablo 18" Carbon Matrix Crossbow Arrows 6pk 22DV18-6