This is a genuine spool and a self-made spool retaining screw for the Crystia CR series. Please note that the spool cannot be used with the CRT series, AIR, or CRS. The retaining screw is compatible with the CR series and CRT series only, and is machined from a single brass rod. Details of the screw are available in another listing, so please check the long type. ※If you have any other questions, please ask in the comments before purchasing. ※Please only purchase if you understand that this is a used item. ※We will offer a discount 【only if you purchase multiple items together】, so feel free to comment. ↓Search tags #ChibiSagi'sFishingTackle #Wakasagi #Crystia