Westin W6 ST5 Fluorocarbon 25m 0.44mm 11.1kg Clear

Westin W6 ST5 Fluorocarbon — Maximum Suppleness for Stronger Knots

The Westin W6 ST5 Fluorocarbon (ST = Suppleness Technology) in 0.44 mm / 11.1 kg is engineered for anglers who demand a soft, flexible leader material that ties clean knots and holds firm under pressure — in both salt and freshwater.

Supple Construction, Exceptional Knot Strength

Rated ST5 — the most flexible grade in Westin's ST range — this fluorocarbon is built for maximum pliability. That softness translates directly into easier knot tying and superior knot strength, so your connection to hook or lure stays secure even when a heavy fish runs hard. Low line memory keeps the leader from coiling off the spool, making rigging faster and more consistent session after session.

Smaller Diameter, Full-Strength Performance

Westin's exclusive production process allows the W6 ST5 to achieve a slim 0.44 mm diameter while delivering an 11.1 kg (24.6 lbs) breaking strain with incredible abrasion resistance. Fast-sinking by nature, fluorocarbon sits below the surface film and remains virtually invisible underwater — an advantage wherever fish are line-shy or conditions are clear.

Choose the Right Variant

The W6 ST5 Fluorocarbon is available across a wide diameter and breaking strain range to suit different rigs, target species, and fishing situations. Match the spool length and diameter to your application:

• 0.14 mm / 1.3 kg — 50 m: ultra-light freshwater finesse; small trout, perch

• 0.17 mm / 1.7 kg — 50 m: light drop-shot or nymph leaders; trout, roach

• 0.19 mm / 2 kg — 50 m: light LRF (light rock fishing) and whitefish leaders

• 0.219 mm / 3.2 kg — 50 m: spinning and feeder leaders; perch, chub

• 0.26 mm / 4.3 kg — 50 m: general coarse and predator leaders; pike, zander

• 0.30 mm / 5.9 kg — 50 m: medium predator leaders; zander, bass

• 0.343 mm / 7.7 kg — 35 m: stronger predator and surf leaders

• 0.38 mm / 9.2 kg — 30 m: heavy spinning and sea bass leaders

• 0.44 mm / 11.1 kg — 25 m: heavy predator and light sea leaders; pike, large zander, inshore saltwater

• 0.52 mm / 14.6 kg — 35 m: pike wire alternative, light boat fishing

• 0.62 mm / 25 kg — 35 m: offshore and heavy boat leaders; large cod, conger

• 0.92 mm / 45.1 kg — 20 m: big-game and heavy shore leaders

• 1.05 mm / 53.5 kg — 20 m: shark and heavy species leaders

• 1.20 mm / 62 kg — 20 m: maximum-strength big-game leaders

Facts

• Diameter: 0.44 mm

• Breaking strain: 11.1 kg (24.6 lbs)

• Spool length: 25 m

• Material: 100% Fluorocarbon

• Hardness rating: ST5 (maximum suppleness)

• Construction: Monofilament

• Sink rate: Fast sinking

• Abrasion resistance: Incredible

• Memory: Low

• Color: Clear

• Water type: Saltwater / Freshwater