SeaKnight Brand W4 Series Ultra-Thinner 4 Strands Fishing Line 300M 500M Stronger Anti-UV Anti-Saltwater Si+coating Braided Line

SeaKnight MANSTER W4 Four-Strand Braided Fishing Line

The SeaKnight MANSTER W4 combines an ultra-density four-strand braid with an updated Si+ silicone-resin coating for a thin, smooth line suited to freshwater and saltwater fishing. Available in 300m and 500m lengths, the range spans line sizes #0.4–#6.0 and rated strengths of 12–80lb, covering light lure outfits through to heavier coastal and boat setups.

Ultra-Density Four-Strand Construction

The tightly woven four-strand construction balances a slim profile with strength and direct feedback. Its low-memory handling helps the line leave the spool without the persistent coils associated with monofilament, while the braid’s responsive feel helps you detect changes in lure movement and fish strikes. Match the selected strength to your rod, reel and fishing conditions rather than choosing by line number alone.

Updated Si+ Coating

The MANSTER W4 uses a two-layer coating system combining UV protection with a seawater-resistant silicone-resin treatment. The updated Si+ surface improves smoothness, wear resistance and heat dissipation, supporting repeated casting and retrieval through the guides. The UV-resistant layer helps improve colourfastness during exposure to sunlight, while the seawater-resistant treatment makes the line suitable for coastal and offshore use as well as freshwater sessions.

Colour Choices and Depth Tracking

Water-based dyeing is used to colour the braid. Low-Vis Green and Low-Vis Gray provide subdued colour choices, while the multicolour version changes colour every 10 metres. Those regular colour changes provide a useful reference when estimating line out, repeating a drop or tracking a presentation through the water.

Choosing Your Line

• Lighter strengths: pair with suitably rated light tackle for finesse lure fishing in streams, lakes and estuaries.
• Heavier strengths: match to stronger rods and reels for larger lures, boat fishing and more demanding coastal work.
• 300m or 500m: choose the length to suit your reel capacity, backing arrangement and the amount of line needed for your fishing.
• Floating specification: account for current, wind and your rig when managing slack line and maintaining contact with the lure.

Range Specifications

• Brand: SeaKnight
• Model: MANSTER W4
• Construction: Four-strand, ultra-density braid
• Lengths: 300m and 500m
• Line number range: #0.4–#6.0
• Rated strength range: 12–80lb, depending on size
• Coating: Updated Si+ silicone resin with UV-resistant and seawater-resistant layers
• Dyeing process: Water-based
• Buoyancy: Floating
• Low-visibility colours: Green and Gray
• Multicolour interval: One colour every 10m
• Applications: Freshwater and saltwater fishing from banks, beaches, rocks and boats

Setup and Care

Spool under steady tension and use suitable backing or a braid-compatible spool to prevent slipping. Add a leader suited to your target species and structure, and check knots and the working end regularly for abrasion. Rinse salt residue from your outfit after fishing and allow it to dry before storage.