.245 standard diameter 100% carbon fiber construction for increased durability and consistency; Every arrow digitally spine aligned for increased accuracy and shot to shot consistency; Each dozen weight matched to +/-0.5 grains for precise shot consistency and tighter grouping; Advanced nano ceramic arrow coating improves penetration and allows for easy removal from targets; Shafts only - no fletchings; Nocks and inserts included; Straightness tolerance: +/- 0.006"; Weighs 8.2 grains per inch (GPI); 12-Pack