Carbon Express 50624 Mayhem Hot Pursuit Arrow for the Female Hunter with Built-In Weight Forward, Fusion Vanes, 150-Sized, Black and Pink Shaft Built-In Weight Forward technology for superior downrange accuracy with a broad head Back shaft section made with patented carbon weave into the outer layer of the arrow for added strength and spine consistency Laser checked for straightness to a remarkable 1/10,000 of an inch Items specifications: 150-Size, 8.0-GPI, 0.505-inch Spine and 0.294-inch Diameter Carbon Express offers the finest arrows, broad heads, crossbows, cross bolts and archery accessories Built-In Weight Forward technology for superior downrange accuracy with a broad head Back shaft section made with patented carbon weave into the outer layer of the arrow for added strength and spine consistency Laser checked for straightness to a remarkable 1/10,000 of an inch Items specifications: 150-Size, 8.0-GPI, 0.505-inch Spine and 0.294-inch Diameter