The most accurate-shooting arrow in the Carbon Express lineup. Its exclusive Dual Spine Weight Forward technology better manages bow-to-arrow energy transfer for significantly faster recovery, which makes the arrows start spinning 20% sooner for pinpoint accuracy and 50% tighter groups at 40 yards than the competition. Its Diamond Weave carbon cross-weave design maximizes spine uniformity for improved precision. Ultrastrong BuffTuff Plus carbon weave for durability. Velocity-enhancing Blazer® vanes. Industry-leading BullDog™ nock collars offer premium nock-end-impact durability. Inserts and nocks included. Per 6. Sizes: 250 (7.4 gpi), 350 (8.3 gpi.). Length: 32.5". Straightness factor: ± .0025". Weight tolerance: ±1.0 grain. Diameter: .290" (250), 0.295" (350).