Fuji Guides BULG guides are heavy duty boat guides that are constructed from heavyweight stainless steel with center bridges for extra ring support and black anodized finishes for beauty. Fuji BULG guides utilize Hardloy rings which are produced from a special blend of high grade Aluminum Oxide. Because the Hardloy rings are diamond polished and permanently mounted to their frames, they result in lighter weight, greater heat dissipation and decreased line wear. Fuji BULG guides can be used with Fuji BULT tops.