These Ravin arrows come with lighted nocks with Lumenok technology. The Match-Grade arrows compensate for the added weight of lighted nocks and weigh the exact same as Ravin non-lighted arrows for the same flight accuracy. Ravin .003 Match-Grade Lighted Arrows400 grain (w/100 grain field tip or broadhead)100% pure carbon constructionStraightness tolerance: .003High-impact brass-threaded inserts and aluminum nock bushings2 offset vanesLumenok TechnologyNote: Use only Ravin-branded arrows with Ravin clip-on nocks Ravin .003 Match-Grade Lighted Arrows 400gr 3 Pack R133