Ravin arrows are designed for superior accuracy, speed, kinetic energy and durability and are only to be used with Ravin crossbows. Ravin .001 Premium Arrows400 grain (w/100 grain field tip or broadhead - NOT INCLUDED)100% pure carbon constructionStraightness tolerance: .001"High-impact brass-threaded inserts and aluminum nock bushings20" length and 2" offset vanesRavin-engineered polymer nocksNote: Use only Ravin-branded arrows with Ravin clip-on nocks Ravin Crossbows Ravin Premium .001 Arrows 400gr 6 Pack R139