Ravin .003 R500 Series Arrows were designed specifically for the high speed and high performance of Ravin R500 Series Crossbows. These durable arrows withstand the wicked kinetic energy of those bows while providing a smooth in-flight path. 6-Pack 400 grain (with 100 grain field tip - not included) 100% pure carbon construction Straightness Tolerance: .003 High-impact brass threaded inserts 2 high-profile offset vanes High-impact aluminum nock bushings Ravin-engineered polymer nocks Use in Ravin Crossbows R500 Series only Note: Use only Ravin-branded arrows with Ravin clip-on nocks.