Made with a high-strength carbon fiber outer shell bonded to a precision 7075 alloy core. Designed specifically for compound archers who shoot field and outdoor target archery. Small diameter and barreled design resist wind drift, even at longer ranges. Straightness tolerance: +-.0015″. Available in sizes 325 (9.2 GPI), 350 (8.8 GPI), 380 (8.9 GPI), 410 (8.5 GPI), 450 (8.1 GPI), 500 (7.8 GPI), 550 (7.5 GPI), 600 (7.0 GPI), 650 (6.8 GPI), 700 (6.7 GPI), 750 (6.4 GPI), 830 (6.2 GPI), 900 (5.8 GPI) and 1000 (5.3 GPI). All components sold separately.