Get Pape's Fat Boy 400 Spine Arrows for a stronger, straighter and more accurate carbon line cutter. The number one carbon arrow for IBO and ASA professional shooters. FatBoy offers speed, large diameter, and accuracy resulting in higher scores for serious archers. The multi layer wrapped carbon fibers have a weight tolerance of plus 2.0 grains and straightness of plus .005 inches. Black, smooth matte finish with internal fit Super UNI Bushing. Points and nocks are not included. 23/64 inches and if FITA legal.