Check the listing for details. FIRENOCK Aerovane 3 arrow vane (18 pcs). Condition: New. Listed at 10.95 USD. Brand New FIRENOCK Aerovane 3 arrow vane (18 pcs) Each pack has 18 pcs, please select 1 out of 12 colors (see photo 3 for sample) See Aerovane 3 on youtube (just input " aerovane 3 ") Features of Aerovane™ III:• Improved True owl wing frontal design for virtually no sound fly as Aerovane III is a improved version of Aerovane II and thus it flies quieter than Aerovane II when shot• Lighter weight than Aerovane II which Aerovane III is 10mm in height or 29% shorter than Aerovane II and weighs only about 5.18 grain or just ~ 20% lighter than Aerovane II• 4 different aerodynamics texture zones (0.0402mm, 0.0201mm, 0.0150mm and 0.0005mm) instead of 3 different vertical texture zones on Aerovane II• Larger total airfoil surface area than Aerovane II to compensate shorter in height so that Aerovane III can have the same total lift and corresponding spin torque as Aerovane II• Incorporation of winglet to improve aerodynamics and further reduce induced drag by wind• 130% higher effectiveness against crosswind than Aerovane II (e.g. Arrow with Aerovane III should hit a target under 35 mph crosswind at 35 yards with archery projectile at 320 fps as compared to Aerovane II under 25 mph crosswind at 35 yards with the same projectile)• 350% higher AEM factor than that of Aerovane II (i.e. Higher AEM = Better ability against the attack of wind. The mechanism is that when the arrow with Aerovane is rotating, the frontal section of Aerovane will bend towards the center of rotation while the tail section will bend away from the center of rotation which results in an most effective angle to encounter attack of the wind) Notes:• Aerovane III should be fletched straight to function.• Aerovane III should be fletched with Aerovane Jig and Aerovane Clamp.• Aerovane III works best with bow with close to perfect nock travel.• Aerovane III cannot work with worn out Whisker Biscuit arrow rest.• Aerovane III has a higher broadhead requirement than Aerovane II due to Aerovane III has having a much higher rotational lift (spin rate) than Aerovane II especially when shooting with high speed arrows.