Westin W6 ST3 Fluorocarbon 0.52mm 35m 16.4kg Clear

Westin W6 ST3 Fluorocarbon — Near-Invisible Leader Material with Heavy-Cover Strength

The Westin W6 ST3 Fluorocarbon in 0.52 mm / 16.4 kg is a purpose-built leader line that balances genuine toughness with a low-visibility profile — ideal for demanding freshwater and saltwater applications where fish scrutinise your presentation.

Low Refractive Index, High Confidence

Made from 100% fluorocarbon, this line bends light at a lower refractive index than standard monofilament, making it significantly harder for fish to detect underwater. Pair that with a clear finish and a fast-sinking profile, and your leader reaches the strike zone quickly without telegraphing its presence.

Medium Stiffness (ST3) for Reliable Knot Strength

The ST3 hardness rating sits in the middle of Westin's ST1–ST5 scale — stiffer than a fully supple leader yet with enough flex to seat knots cleanly and hold under pressure. At 0.52 mm diameter and 16.4 kg breaking strain, this spool suits heavier rigs where both abrasion resistance and connection integrity matter. The 35 m spool length gives ample material for multiple leader set-ups.

Choose the Right Variant

The W6 ST3 Fluorocarbon is available across a wide range of diameters and spool lengths to suit virtually every technique and species:

• 0.14 mm / 1.4 kg — 50 m: ultra-light finesse rigs, small stream trout, clear stillwaters

• 0.17 mm / 1.7 kg — 50 m: light drop-shot and nymph leaders, small lure fishing

• 0.19 mm / 2.2 kg — 50 m: general light freshwater leaders, perch and roach

• 0.219 mm / 3.4 kg — 50 m: spinning leaders for trout and bass in open water

• 0.26 mm / 4.5 kg — 50 m: all-round freshwater leader for pike traces and carp rigs

• 0.30 mm / 6.1 kg — 50 m: medium-duty leaders for zander, bass, salmon

• 0.343 mm / 7.9 kg — 35 m: heavier spinning and jigging leaders, inshore saltwater

• 0.38 mm / 9.3 kg — 30 m: robust leaders for larger predators, surf fishing

• 0.44 mm / 11.6 kg — 25 m: pike, muskie, and strong-current river fishing

• 0.52 mm / 16.4 kg — 35 m: heavy predator leaders, large pike/muskie, nearshore saltwater; solid knot strength at heavier breaking strains

• 0.62 mm / 26.1 kg — 35 m: big-game freshwater and light offshore leaders

• 0.92 mm / 49.2 kg — 20 m: heavy offshore and big-game leaders, wire-replacement rigs

• 1.05 mm / 56.5 kg — 20 m: extreme-duty saltwater leaders, large predatory species

• 1.20 mm / 64.2 kg — 20 m: maximum-diameter, top-end breaking strain for the most demanding offshore applications

Facts

• Material: 100% Fluorocarbon

• Diameter: 0.52 mm

• Breaking strain: 16.4 kg (36.3 lbs)

• Spool length: 35 m

• Hardness rating: Medium (ST3)

• Sink rate: Fast sinking

• Abrasion resistance: Exceptional

• Construction: Monofilament

• Colour: Clear

• Water type: Saltwater / Freshwater