This .204 diameter shaft is smaller than standard hunting arrows which reduces wind drift and increases penetration while maintaining extreme durability. MaxxKe Technology also increases kinetic energy during impact, helps the arrow to recover quicker in flight, and ensures your arrow hits hard every time. Straightness tolerance of +-.001”. Available in sizes 250 (9.0 GPI), 300 (8.8 GPI), and 350 (8.8 GPI) and 400 (8.9 GPI) Includes AAE nocks and SHOK inserts.