The InTouch Trout LT (Light Touch) WF line is available in both double taper, and weight forward profiles, and features a long, fine front taper for
Rio Intouch Trout LT Double Taper
Amplitude Textured Double Taper Fly Line
Still crazy after all these years Hatch Magazine - Fly Fishing, etc.
Fly Fishing #2 Weight Fly Lines
Scientific Anglers Amplitude Double Taper Fly Line - Blue Ribbon Flies
Orvis Hydros Trout Double Taper Floating Fly Fishing Line
Ballistic Double Barrel Fly Line
A Basic Guide to Saltwater Fly Fishing in Belize- Fly Lines and
Maximumcatch Double Taper Fly Line 2/3/4/5/6/7/8 WT Floating Fly
What's on Your Reel? Fly Line and Backing Explained
Understanding Fly Line Tapers and Diagrams - Fly Fishing
Snowbee XS Double Taper Fly Line
Rio Mainstream Floating Double Taper Fly Lines