Our most popular crossbow vane, the shield cut 3" X Vane is equally well-suited for compound bowhunting, 3D, and indoor spots, and it is NASP approved. Its length and profile provide just the right amount of steerage for large diameter arrows. The 3" (76.2mm) X Vane measures 0.48" (12.1mm) in height and weighs an average of 10.0 grains (648 mg). Like all Bohning vanes, the base of the X Vane is pre-primed for optimal adhesion.