"Count on consistent superior performance this season with Carbon Express Photon 6mm Hunting Arrows. Offering advanced, forgiving Tri-Spine performance in a standard-diameter arrow, the Photon 6mm gives bowhunters high speed, great accuracy, and forgiveness from a standard-diameter design. This advanced 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. 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 6mm stainless steel 40-grain inserts. Fletched with Bohning Alpha vanes. Straightness: .001"". Weight Tolerance: 1.0 grains. I.D.: .244"". Advanced bowhunting arrows from Carbon Express Tri-Spine design - less oscillation, greater accuracy RED ZONE dynamic spine management - optimized broadhead performance and accuracy 360 Spine Consistency - consistent arrow reaction shot after shot Bulldog nock collars 6mm stainless steel 40-grain inserts Fletched with Bohning Alpha vanes Straightness: .001"" Weight Tolerance: 1.0 grains"