Thinking Anglers Crimp Link Tinted Fluorocarbon 20m is a super-strong, specialist pure fluorocarbon designed for use as a boom material, whether you prefer to crimp or knot it. It offers exceptional strength and shear resistance, making it ideal as a heavy-duty leader material, and it straightens beautifully for rig applications. The refractive properties and colour tint make it practically invisible underwater. Available in 30lb and 35lb breaking strains.