The 4" Bronco® Vane (formerly called the Killer Vane) is great for indoor compound archery and traditional archers looking for a profile similar to feathers but with superior durability. It measures 4" (101.6mm) in length and 0.5" (12.7mm) in height, and weighs an average of 12.5 grains (810 mg). Like all Bohning vanes, the base of the 4" Bronco Vane is pre-primed for optimal adhesion. Proudly manufactured at the Bohning Factory in Lake City, Michigan, United States.