Westin W6 ST3 Fluorocarbon is a 100% fluorocarbon leader line engineered with a medium stiffness rating, placing it between the stiffest and most supple options in Westin's ST1 to ST5 scale. This balanced flexibility is designed to deliver maximum impact and knot strength while maintaining a small diameter. The line sinks quickly, helping it reach the strike zone faster, and its lower refractive index compared to monofilament makes it significantly less visible underwater. W6 ST3 fluorocarbon is available in diameters from 0.14mm to 1.20mm. - Fast sinking - Exceptional knot and tensile strength - 100% Fluorocarbon - Medium stiffness - High knot strength