Carbon Express T1318 Pile Driver Hunter 250 Predator Vane Heaviest arrow in the Carbon Express line to create maximum kinetic energy and greater knockdown power for ultimate penetration Fletched with 2-inch Assault low-profile performance vanes for maximum arrow velocity and greater accuracy Laser checked for straightness to a remarkable 1/10,000 of an inch Items specifications: 250-Size, 10.4-GPI, 0.402-inch Spine and 0.304-inch Diameter 36-pack of "Mossy Oak Brush" pattern shafts are sorted and matched by weight and spine for best-in-class consistency