The Fuji ALCONITE K-Series Tip Tops are built using an Alconite ceramic ring and stainless steel frame to give anglers a lightweight option for building custom rods, or replacing broken tops. In addition to being 35% lighter than other guides, the Fuji ALCONITE K-Series Tip Tops are as much as 50% stronger as well. For increased castability and control, the Fuji ALCONITE K-Series Tip Tops are smoothed-out using Fuji’s Diamond Polishing System. Try the Fuji ALCONITE K-Series Tip Tops on your rod and see why Fuji has been trusted by anglers for over 40-years. Guide Ring Size Tube Bore Interior Diameter 5.5 1.8mm 5.5 2.0mm 5.5 2.2mm 5.5 2.4mm 6 1.8mm 6 2.0mm 6 2.2mm 6 2.4mm 6 2.6mm