Be sure to read this article on fly rod weight before you make your rod purchase. You'll gain a better understanding of what you need.
The PERFECT Fly Rod for Fly Fishing! — Trout & Feather
Have a Crappie Day with a Fly Rod, by Jim Mize - Crappie Now
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The What Weight fly Rod Question : r/flyfishing
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What Do the Numbers on a Fly Rod Mean? (With Fly Rod Chart) - Guide Recommended
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Fly Rod Guide by Harry Murray at Murray's Fly Shop
The Most Versatile of Fly Rod - Weight, Action, & Length Explained