The ForeCast SU guides are heavy duty for the harshest conditions. This SU guide heavy duty braced design is ideal for heavy salt water boat rods. ForeCast SU guides have been specifically designed for the 50-80lb line class, providing much needed strength and durability. The ForeCast SU guide is essential when harsh conditions is what you will endure. Due to the heavy duty construction, the brass frames with hard aluminum oxide rings are double plated to resist corrosion.