RIO FLUOROFLEX STRONG TIPPET MATERIAL –Made with 100% Fluorocarbon-some of the strongest, thinnest fluorocarbon available. INCREDIBLE STRENGTH plus higher density to sink just below the surface for "anti-shine" making it equally effective for dry fly & nymph fishing. Dispensed from interlocking, rotating spools that are well marked for easy ID. SIZES: 7X(2.5-lb), 6.5X(3.1-lb), 6X(3.8-lb), 5.5X(4.5-lb), 5X(5.2-lb), 4.5X(6.1-lb), 4X(7.3-lb), 3X(8.8-lb), 2X(11.2-lb), 1X(13.3-lb), 0X(15.5-lb) $17.99/30-yd spl