The Absolute Trout Fluorocarbon Tippet from Scientific Anglers is the strongest the brand has on offer, with up to 33% higher knot strength. Supple for drag-free stealth, the 100% fluorocarbon tippet combines a softer outer layer to keep knots secure, with a harder core for exceptional tensile strength. Patented cutter spool with tippet band makes dispensing and identification easy. In clear. Imported. Sizes 3X-6X, 30m spool in all sizes. Absolute Trout Supreme Fluorocarbon Tippet Size 4X Scientific Anglers