The Carbon Express Photon 4mm is a micro-diameter arrow built for high speed, reduced wind drift, and consistent long-range accuracy. Its 4mm profile helps minimize drag and crosswind influence, while Tri-Spine Technology stabilizes the arrow at launch for fast recovery and repeatable grouping. Manufactured to a 360 degree spine consistency standard, each shaft is designed to tune and fly uniformly from arrow to arrow. Straightness is rated to +/- 0.002 inches max with a +/- 1.0 grains weight tolerance for dependable precision.