Ravin 400 Spine Carbon Crossbow Bolt - 6 Pack - The Ravin 0.003 Arrows are just what you need for a consistent straight shot. The 100% pure carbon construction adds another dimension of strength to ensure your arrow stays straight upon impact. Are you ready to upgrade your archery game? It all starts with the Ravin 0.003 arrows. 6-Pack 400 grain (with 100 grain field tip- not included) Use in Ravin Crossbows only Not compatible with R500 Series 100% pure carbon construction Straightness tolerance: .003in High-impact brass threaded inserts 2in high-profile offset vanes High-impact aluminum nock bushings Ravin-engineered polymer nocks