Fuji Guides BHNNG guides are specifically designed for saltwater use with their Silicone Nitrate rings and strong but flexible black anodized stainless steel frames. Fuji BHNNG guides are more than 30% lighter than standard heavy duty guides yet will withstand punishment from saltwater grade lines - Even Wire Line and Braids!! Their Silicone Nitrate II rings are bonded directly to their frames and provide strong, smooth, and durable rings that will hold up under years of saltwater abuse. Fuji BHNNG guides can be used with Fuji BHGNT tops.