Gold Tip Velocity Shafts 600 1 doz. VEL600S. Straightness tolerance of +- .006" and weight tolerance of +- 2 grains. Available in sizes 600 (5.9 GPI) 500 (6.3 GPI) 400 (7.4 GPI) 340 (8.2 GPI) and 300 (8.8 GPI). Includes Accu-Lite nocks and inserts....