Berkley Fireline Ultra 8 Carrier uses 8 carriers (thin or small diameter lines) to make one tough and strong line that is able to handle abrasion well.
Would 50 lb PowerPro be the best braided line for my Penn Battle II 6000 spinning reel if I'm currently fishing for catfish in lakes? - Quora
The Angler Magazine, August 2017
Fishing Line Strength Test - Berkley FireLine, Nanofil, Stren XL ( 8 lb Test )
Fishing Line, Braid, Mono
Berkley FireLine Ultra 8 Superline Review - Wired2Fish
How To Reviews Archives - Share the Outdoors
Compendium i2 by Fishing Megastore - Glasgow Angling Centre - Issuu
Berkley 2017 Catalog by Maciek Respondek - Issuu
Fireline Ultra 8 Carrier Braid Fishing Line