Fuji Guides USG guides are heavy duty boat guides that are constructed from heavyweight stainless steel with center bridges for extra ring support and gunsmoke finishes for beauty. Fuji USG guides utilize Silicone Carbide rings which is one of the most advanced ceramics made today. Diamond Polished SiC rings are mounted directly to their frames, which reduces weight, increases heat dissipation, and amplifies line sensitivity. Fuji USG guides can be used with Fuji UST tops.