The Carbon Express Photon 4mm Arrow Shafts are built for target archers who demand consistency and accuracy. Powered by Tri-Spine Technology and a .001 straightness tolerance, every shaft in the pack is competition-ready right out of the box. Bohning Alpha Vanes and 360 spine alignment deliver stable, repeatable flight - whether you're shooting 3D, indoor, or outdoor. Tri-Spine Technology - Superior spine consistency for tighter groups .001 Straightness Tolerance - Laser-checked precision, every time 50 Grain Aluminum Outsert - Improved FOC balance and durability 360 Spine Alignment - Broadhead-ready accuracy Available Spines. Features100% high modulus carbon arrow shaft construction for strength and lightweight performanceBuilt with Tri-Spine Technology for improved consistency and accuracyPrecision straightness tolerance of .001 for dependable shot placementAvailable spine options: .400 (7.7 GPI), .350 (8.2 GPI), and .300 (8.9 GPI)Includes 50 grain aluminum outsert for added du...