The Berkley Vanish Transition is a fluorocarbon fishing line that reflects light in order to appear invisible underwater, yet remain visible above the water's surface.The easy-casting fluorocarbon that's virtually invisible. Vanish refracts light similarly to water, making it virtually invisible to fish. Berkley's Vanish Transition maintains 100 percent of its knot and line strength when wet. Its higher density makes it sink faster, and the low-stretch formula increases sensitivity and hook setting power. We offer the Berkley Vanish Transition Fluorocarbon line in seven sizes: 6, 8, 10, 12, 14, 17 and 20 in two colors: clear/gold and crimson red. Each spool contains 250yds.