Supplex Fluorocarbon is available in no less than 12 accurate diameters and breaking strains, from 0.075mm (0.9lb) right up to 0.30mm (10lb). supplex-fluorocarbon-4-4lb As it is made from 100% fluorocarbon, it is exceptionally abrasion resistant, sinks well and doesnt degrade in sunlight like standard mono can. It also has a very similar refractive index to water, making it almost invisible in clear water. Fluorocarbon is also less prone to spinning up on the retrieve compared to standard mono, making it a great choice for when you are continually casting out and reeling in. Each size comes on a convenient 50m spool that shouldnt take up too much room in your tackle box. In clear water and when bites are at a premium, Supplex Fluorocarbon can make all the difference!