The Gas Pro Naca 170 is a great choice to maximize arrow speed and optimize stability, thanks to the patented NACA design. In a compact length of just 1.7'' (43mm), and made with the best Gas Pro material available, the NACA 170 Vane is an excellent choice for any type of shooting, in any conditions. Features: Increase rotations by up to 400% Gyroscope effect for better grouping Maximizes arrow speed Patented Naca design Specifications: Length: 1.70'' | 43mm Height: 0.35" | 9mm Weight: 6.7 grains Quantity: 40-Pack Made in Italy Color: Black, blue, green, pink, red, white, flo orange, flo yellow