Carbon shaft that was developed to serve indoor, 20 and 18 meter tournaments to conform to the 9.3 mm OD set by the FITA and NAA rules. They have a diamond finish that provides a smoother draw and easy arrow removal from targets. They have a .0025" straightness, 1.0 weight tolerance and a spine selection tolerance of .002". The 400 weigh 9.5 GPI and 500 are 9.0 GPI. They come with BullDog nock collars and pin nock adapters. Parabolic and Pin points are sold separately. WE WILL NOT CUT SHAFTS.