Altra Centrum 204 Limited Shafts .003 350 1 doz. High-grade carbon shafts;Straightness spec: Up to 0.003 inches;NO SPINE Technology for improved tunability and consistency;State-of-the-art measuring equipment for straightness verification;Weight-matching process for consistent arrows;Premium components made from high-grade aluminum and stainless steel;Designed for unmatched precision and efficiency;Ideal for achieving the pinnacle of precision and performance