Gold Tip Kinetic XT 400 Arrows with Feathers (Pack of 12), Black 1 dozen black carbon arrows with 4" feathers 9.5 grains per inch with a +/- 0.5 grain weight tolerance .204 Accu-Tough nocks and .204 Accu-Tough inserts included Shafts are 30" long, have a straightness tolerance of +/- .003", have a .400" spine, have an outside diameter of .270" and inside diameter of .204" Vane and nock colors vary