The RIP XV was designed and extensively tested for two qualities speed and long-range accuracy. Victorys carbon engineers synthesized different high-modulus carbon formulas to develop this sub 6 GPI ultra-light and super-deadly arrow. The .204 small diameter shaft leaves less surface area for wind deflection, and its lightweight construction delivers extremely flat trajectories over long distances. Coupled with Victorys SHOK insert for better penetration and high FOC, the RIP XV is the perfect extreme velocity hunting arrow.Specifications:Archery style: HuntingConstruction: 100% Carbon FiberOutside diameter: 0.251 (350), 0.247 (400), 0.242 (500)Inside diameter: 0.204Straightness: +/- .001Weight tolerance: +/- 0.5 grains (per dozen)Fletching: Not fletchedSold quantity: 12 packAvailable Spine Size (Weight):350 (6.4 gpi)400 (5.9 gpi)500 (5.1 gpi)