High-strength carbon fiber bonded to a 7075 alloy core Polished black carbon shaft Parallel shaft design Weight tolerance: +/- .5 grains Straightness tolerance: +/- .0015" 300 (9.5 gpi), 340 (8.9 gpi), 380 (8.3 gpi), 420 (7.8 gpi), 470 (7.3 gpi), 520 (7.0 gpi), 570 (6.6 gpi) Components sold separately All spines accept Easton 4MM Pin (1150-1000 use #1 | 880-520 use #2 | 470-420 use #3 | 380-250 use #4) Point options: Easton 4MM HL Stainless Steel Break-Off Points (1150-810 use #1 | 710-470 use #