Scientific Anglers Fluorocarbon Tippet - Offers low visibility, and provides excellent knot strength. Up to 35% stronger than previous materialThe highest wet-knot strength in the industryTrue-to-spec X sizesSizes: 7X - 0XLength: 30-meter spoolsHard, abrasion-resistant outside; softer coreThe ultimate in ultra-low visibilityPatented cutter spool designMPN: 1155