"Offering advanced Tri-Spine performance in a small-diameter arrow, Carbon Express Maxima RED 5mm Hunting Arrows deliver top bowhunting performance. This TriSpine design combines RED ZONE dynamic spine management technology in between stiffer ends to reduce oscillation and speed arrow recovery for more stable arrow flight and better accuracy with broadheads. The arrow's Weight Forward front section helps deliver flatter trajectories, retain energy through flight, and improve penetration after impact. Its thinner diameter shaft reduces wind drift in flight and maximizes kinetic energy for improved penetration after impact. 360 Spine Consistency delivers consistent arrow reaction shot after shot, allowing faster and easier tuning and better downrange consistency regardless of vane and nock orientation. Comes with Bulldog nock collars and 5mm aluminum sleeved 2-piece 40-grain inserts. Fletched with Bohning Alpha vanes. Straightness: .001"". Weight Tolerance: 1.0 grains. I.D.: .204"". Advanced, small-diameter bowhunting arrows from Carbon Express Tri-Spine design - less oscillation, greater accuracy RED ZONE dynamic spine management - optimized broadhead performance and accuracy Weight Forward front section - flatter trajectories, improved penetration 360 Spine Consistency - consistent arrow reaction shot after shot Bulldog nock collars 5mm aluminum sleeved 2-piece 40-grain inserts Fletched with Bohning Alpha vanes Straightness: .001"" Weight Tolerance: 1.0 grains"