The Altra 166 Premier Carbon Arrows deliver unmatched performance in credit to the high-grade carbon construction. The NO SPINE technology enhances tunability and consistency. FeaturesCrafted from high-grade carbon for superior accuracy and efficiency.Industry-leading straightness of .001" verified by advanced measurement technology.NO SPINE Technology provides unmatched tunability and consistency.Proprietary high modulus carbon construction for exceptional durability.Premium aluminum and stainless steel components ensure high-quality performance.SPECIFICATIONS: Pack: 6 fletched shafts (1 grey/2 white Altra-branded Q2i RAPT-X vanes)Weight Match: Each package is weight-matched to +/- 1 grain.Length: 32" total.Components Included: A.R.C.O.S. Insert/Outsert System and nocks.