A parallel taper design for superior accuracy, high FOC, and faster arrow recovery in flight. A thinner, weaker tail section reduces wind drift and improves clearance during launch, while a thicker front section increases FOC and improves down range accuracy. Spine tolerance: .006 Inch. Weight tolerance: 0.5 grains. Available in sizes: 300 (8.3 GPI), 355 (7.4 GPI), 450 (7.4 GPI), 550 (7.1 GPI). Shafts include gold pin bushing and pin nocks.