Developed by taking the best characteristics from standard 19/64” arrows and smaller 17/64” arrows. Built for maximum accuracy and penetration while still utilizing an insert. Straightness tolerance of .001” or better and weight tolerance of +-1 gr. Available in sizes 350 (8.0 GPI), 400 (7.2 GPI), and 500 (6.4 GPI). Includes nocks, nock bushings, and inserts.