The Ridgemonkey FluoroCast Fluoro Coated Mainline is a very tough and durable line for carp fishing. The line is made from a Japanese copolymer with an external coating of fluorocarbon. Each spool contains 1000 meters of line. This line is very suitable for making knots and has little stretch, which makes it the ideal line for fishing carp and other fish species. The transparent colour of this line makes it completely invisible underwater.