Carbon Express Heritage BuffTuff Carbon Arrow Shafts, Size 150, 12-Pack, Classic Cedar Pattern Bare shafts come with LAUNCHPAD Precision Nocks (nock color may vary from image) BuffTuff - Shaft made with patented BuffTuff, the world's toughest and quietest carbon arrow finish Laser checked for straightness to a remarkable 1/10,000 of an inch; Straightness of +/- 0.005" is a maximum measurement, not an average Item specifications: 150-Size, 10.11-GPI, 0.495-inch Spine and 0.305-inch Diameter 12-pack of classic cedar finished shafts are sorted and matched by weight for best-in-class consistency