Lower numbers weights 2 6 denote smaller gear best suited to trout and panfish. For instance you would match an ultra 4 5 weight fly line with a 5 weight fly rod and youd spool it on a 456 fly reel.
Hatch Premium Backing Reelflyrod
Setting Up Your Fly Rod Line Backing Leader Troutcatchers
Fladen Warbird Complete Fly Fishing Kit 3pc Carbon Rod Reel Line
Search Q Tippet To Leader Knot Tbm Isch
Wetfly Nitrogen1 Fly Reel Wetfly