RIO 30 lb Fly Line Backing 300 Yard Spool - The Saltwater Edge
Rio Products Fly Line Backing 300 yds. 30 lbs. - Sulphur Creek
How to Tie Backing to a Fly Line: 12 Steps (with Pictures)
Backing – Bozeman FlyWorks
Cabela's Prestige White Fly Line Backing (#20) F1598445
Backing - Odense Jagt & Fritid
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RIO Multi Color 8-Strand Gel Spun Fly Line Backing, 65lb / 100
Braided Fly Line Backing Line 20/30LB 100/300Yards Orange Green