Gold Tip Expedition Hunter 5575/400 Carbon Arrows with 4-Inch Feathers (Pack of 12) 1 dozen black carbon arrows with 4" feathers 8.2 grains per inch with a +/- 2 grain weight tolerance .246" GT-Series nocks and .246" Accu-Lite inserts included Shafts are 32" long, have a straightness tolerance of +/- .006", have a .400" spine, have an outside diameter of .295" and inside diameter of .246" Vane and nock colors vary