Gold Tip Velocity Shafts 600 1 doz.. Straightness tolerance of +- .006" and weight tolerance of +- 2 grains. Available in sizes 600 (5.9 GPI) 500 (6.3 GPI) 400 (7.4 GPI) 340 (8.2 GPI) and 300 (8.8 GPI). Includes Accu-Lite nocks and inserts. Specifications for Gold Tip Velocity Shafts: Manufacturer: Gold Tip Color: Black Quantity: 12 Fletching: 2in Rapt-X Vanes Nock Type: Gold Tip Straightness: 0.006 in Inner Diameter: 0.246 in Features of Gold Tip Velocity Shafts GPI 8.8 Length: 32" Straightness Tolerance: +/- .6" Weight Tolerance: +/- 2 gr Outer Diameter: .299" Inner Diameter: .246" Package Contents: Gold Tip Velocity Shafts Accu-Lite Nock Accu-Lite Insert Gold Tip Velocity makes slow bows fast and fast bows faster. The Velocity is the affordable way to speed. Constructed of Gold Tip's Smart Carbon Technology for unmatched durability and straightness retention. Features/Specifications: GPI 5.9Length: 30Straightness Tolerance: +/- .6Weight Tolerance: +/- 2 grOuter Diameter: .283Inner Diameter: .246 Included Accessories: Accu-Lite NockAccu-Lite Insert Small