Gold Tip Laser IV 20-Inch Bolts with 4-Inch Vanes and Moon Nocks (72 Count) 72 black carbon crossbow bolts with 4" vanes 13.9 grains per inch with a +/- 2 grain weight tolerance Aluminum GT moon nocks and 60 grain brass inserts included 20" shafts have a straightness tolerance of +/- .005" and have an outside diameter of .347" and inside diameter of .272" Vane and nock colors vary