Berkley FireLine is unlike anything you've fished before. It's stronger than monofilament. It casts farther and it handles as well, even better in some situations. FireLine doesn't create birds nests by digging into your spool for smoother casts, and hassle free use. FireLine is as durable as it is versatile. It won't deteriorate over a lifetime as ultra-light rays or sunlight won't affect it. No other line delivers this combination of easy handling, castability, super strength and sensitivity. And no tackle box should be without it.This line has virtually no memory and no stretch. One of the more popular uses of FireLine is for trolling with Dipsy Divers.We stock FireLine in Smoke and Flame Green colors. We stock this line in 4, 6, 8, 10, 14, 20 and 30 pound tests, and in 125 yard spools and 300 yard spools.The specifications for this line are listed in the table below. "Comp. Diam." refers to "comparable diameter." We provide the comparable diameter of the line if it were monofilament. For example, 30 pound test FireLine has a diameter which is comparable to the diameter of 12 pound test monofilament.