Penzill Fluorocarbon Strong has been specially developed for spin fishing. This high-performance fluorocarbon is crystal clear and especially resistant to abrasion and knots. A certain stiffness prevents tangling when throwing and reduces the danger of hanging. But it is also so supple that it knots excellently and gives even small baits a clean run. Fluorocarbon has the same refraction factor as water. The Penzill Fluorocarbon is also crystal clear and thus almost invisible in the water.