Strait out of the 3rivers catalouge, listed under the Beeman ICS bowhunter shafts. But that list is standard for Easton and Beeman shafts, and other shafts that are spined the same way! Dont understand why carbon express does it differently? Or why easton aluminum shafts are half this way and half another way!
I personally have the 500’s and would actually recomend that you get like the 400’s and leave them longer, because normally the 500’s are light, what shaft are you looking at/have?