20/30 Lbs Fishing Line 50 Meters Braided Dacron Fly Backing Lines

If I put braided fishing line that has a higher pound test than my reel/rod is rated for, but it is the same size as the mono pound test, what will happen?

Goture 20LB Fly Line Backing 100M/109Yrd 8 Strands Dacron Braided Line Yellow&Black Double Color Backing Line for Fly Fishing

Dacron Backing Scientific Anglers

Black Fly Fishing Fishing Lines & Leaders 30 lb Line Weight for sale

Fishing Line, Fishing Leader Line Online

1pc Multicolor Premier 300M 500M 1000M Multifilament PE Braided Fishing Line 4 Stand 6LB 30LB 40LB 50LB 60LB 70LB 80LB 120LB

Features: * brand new and high quality *Made of high-quality materials, durable *Braided Dacron fly line backing is crafted from braided polyester,

20/30lbs Line Backing Fishing Trout Line&Loop Dacron 8 Braided Fly Line Backing

Different Types of Fishing Line Explained

Durable Fly Fishing Line 50m Tear Resistant Braided Backing Line & Loop 20/30LB Fishing Supply Gift for Fishing Lovers