Rio Mainstream Sink Tip Line Size:WF4F/S3 a screw-in fighting butt and

a screw-in fighting butt and counterweight washers that fine-tune balance

Slightly heavier than standard lines for easy loadingSupple core with a slick coldwater coating

Improved version of the GPX taper

a fish perhaps

• The tips are color-coded for quick identification and are made with an easy-to-weld coating

Rio Mainstream Sink Tip Line Size:WF4F/S3 a screw-in fighting butt andRIO's Mainstream series of fly lines have been developed to meet the overall needs of the average and novice fly fisher, and are designed to optimize rod performance with slightly heavier and shorter head lengths. Every Mainstream line undergoes the same rigorous production processes and quality control standards as all RIO fly lines, and is made in RIO's Idaho manufacturing facility. Each line is built with a slick coating on a supple memory free