The Alpha® vane is a profile for Bohning that combines Stealth + Speed + Torque. The vane features an Advanced Torque Apex with a gradual taper to the tail which gives you optimal balance of spin and stealth. At the rear of the vane, you will see a contoured tail which minimizes vane flutter, reducing noise and helping retain speed. The vane measures 2.8″ (71.1mm) in length, 0.45″ in height (11.4mm) for low clearance, and each vane weighs 8.5 grains. The Alpha vane excels as a 3D Vane, Hunting Vane, Indoor Target Vane and a Crossbow Vane. It is made from Bohning’s AR1250 Material, a stiffer material that allows for fast, ultra-quiet flight over longer distances and provides maximum speeds when fletched at a 1 degree offset. All Bohning vanes are pre-primed and do not require vane cleaning or pen primers.