Cortland Gel Spun Fly Line Backing - 300 Yards

Made from super-high-strength gel-spun fibers, braided to exact specifications The tight, round braid allows you to pack a lot of backing onto small

If you're looking for the best backing available, nothing can beat the XTS gel SPUN backing. With a diameter a fraction of the standard material, XTS

Scientific Anglers XTS Gel Spun 250 yd Polyethylene Fly Line Backing, Yellow, 30#

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mathematical formula for spool capacity needed

Cortland Gel Spun Fly Line Backing - 300 Yards (30 LB, Blue) : Sports & Outdoors

Scientific Anglers XTS Gel Spun Fly Line Backing, 50 lb Test, Yellow - 100, 150, 200, 250, 300, 400, 500 up to 3000 yds (100 yds) : Sports & Outdoors

Fly Line Backing - Multi Color Gel Spun

What is Fly Line Backing and How Much Do You Need? - Guide Recommended

Cortland Fly Line

What is Fly Line Backing and How Much Do You Need? - Guide Recommended

SCANGLER Backing Orange Fly Line - 250 yd

What is Fly Line Backing and How Much Do You Need? - Guide Recommended