RIO Butt Materials are available in Trout for 3 & 4 weight rods(.022in), trout 5-6 wt(.025 in) and Saltwater Hard Mono .025 in (6-7 wt.) .028 in (8-10 wt.) and .032 in (11-15 wt.).

Use this material for creating butt sections on any fly lines. Simply use a nail knot to attach the butt material to your fly line and tie a Perfection Loop on the end of the 6''-8'' piece of butt material.