Carbon Express Mayhem Hunter Carbon Arrow Shaft, 12-Pack, Mossy Oak Obsession Pattern Bare shafts come with LAUNCHPAD Precision Nocks and BullDog Nock Collars (nock color may vary from image) Features exclusive "Built-in Weight Forward" technology for superior downrange accuracy with a broadhead Laser checked for straightness to a remarkable 1/10,000 of an inch; Straightness of +/- 0.0035-inches is a maximum measurement, not an average Item specifications: 350-Size, 9.8-GPI, 0.347-inch Spine and 0.303-inch Diameter 12-pack of "Mossy Oak Obsession" camouflaged pattern shafts are sorted and matched by weight and spine for best-in-class consistency