Carbon Express T1310 Mayhem Hunting Arrow with Built-In Weight Forward, 250-Sized Mossy Oak Obsession Camouflaged Shaft, 36-Pack Provides 360-degree spine consistency and delivers the ultimate combination of speed, accuracy and penetration Features exclusive "Built-in Weight Forward" technology for superior downrange accuracy with a broad head Laser checked for straightness to a remarkable 1/10,000 of an inch Items specifications: 250-Size, 8.8-GPI, 0.418-inch Spine and 0.300-inch Diameter Complete performance package 36-pack in a camouflage arrow