The Super 21 FC Fluorocarbon monofilament from Sufix is practically invisible in the water, has low elasticity for better control, better presentation of the bait and sensitivity in the hits. Extremely resistant to abrasion for fishing in spots full of obstacles but at the same time quite soft. A fluorocarbon sinks 4 times faster than a traditional nylon allowing for quick line tensioning. Diameter 0.16mm - 2.6kg - 6lb Diameter 0.20 mm - 3.2 kg - 4 lb Diameter 0.28mm - 5.4kg - 8lb Sufix authorized dealers.