International 4A center fin showing classic base and smooth rake for controlled turning
International 4A 6 inch center fin with natural volan fiberglass construction
International 4A center fin showing classic base and smooth rake for controlled turning
International 4A 6 inch center fin with natural volan fiberglass construction

6" International 4A Center Fin – Volan Pro Glass.

$95.00

A classic 6-inch center fin with smooth volan flex—perfect for surfers seeking control, flow, and traditional feel in a compact fin size.

A classic 6-inch center fin with smooth volan flex—perfect for surfers seeking control, flow, and traditional feel in a compact fin size.

Depth 6.1” Base 4.5”

The 6" International 4A Center Fin in volan Pro Glass is a compact, versatile center fin designed for smooth control, reliable hold, and classic feel. Based on the proven 4A template, this fin delivers balanced performance with a touch of traditional flex—making it an excellent choice for mid-lengths, single-fin boards, and 2+1 setups where manoeuvrability and flow are key.

Constructed from premium volan Pro Glass fiberglass, the fin offers a slightly softer, more organic flex compared to standard fiberglass. This results in smoother turn initiation, controlled projection, and a forgiving feel through transitions, especially in smaller or clean conditions.

Key Features

  • 6" center fin for balanced control and manoeuvrability

  • International 4A template for smooth, all-round performance

  • Volan Pro Glass construction for classic flex and durability

  • Softer, more forgiving feel compared to standard fiberglass

  • Ideal for mid-lengths, single fins, and 2+1 setups

  • Timeless natural volan fiberglass finish

Performance Benefits

  • Smooth, predictable turning response

  • Easy trim with controlled hold

  • Classic flex for flowing lines

  • Excellent balance of stability and looseness

Recommended Conditions

  • Knee-high to head-high surf

  • Beach breaks, points, and mellow reefs

  • Clean to lightly textured conditions

Fin Specifications

  • Fin Type: Center fin

  • Height: 6"

  • Template: International 4A

  • Construction: Volan Pro Glass (fiberglass)

  • Fin Box: Longboard box (sliding fin box) / US box

  • Recommended Boards: Mid-lengths, single fins, 2+1 surfboards

Fin Box Compatibility

The 6" International 4A Center Fin is designed to fit a standard longboard / US box (also called a single fin box or sliding fin box).

  • Fin box type: US box / Longboard box

  • Mounting: Fin plate and screw (standard single fin hardware)

  • Not compatible with: FCS, FCS II, Futures, or other plug-style fin systems

Highlights

  • 6" Center Fin for Mid-Length & 2+1 Boards
    Compact size offering smooth control and easy manoeuvrability.

  • International 4A Template
    Balanced, all-round shape for trim, flow, and predictable turning.

  • Volan Pro Glass Construction
    Classic fiberglass feel with a slightly softer, more forgiving flex.

  • Smooth, Traditional Performance
    Loads gradually through turns and releases cleanly off the tail.

  • Sliding Fin Box Compatible
    Fits standard longboard / sliding fin boxes using fin plate and screw.

  • Timeless Natural Volan Finish
    Traditional look that suits both modern and classic surfboard designs.

FAQs

What boards suit a 6-inch center fin?
A 6-inch center fin works well on mid-lengths, shorter single fins, and as the center fin in a 2+1 setup.

What is volan Pro Glass?
Volan Pro Glass is a traditional fiberglass material known for its smoother, more forgiving flex compared to standard fiberglass.

Is this fin suitable for everyday surfing?
Yes. Its balanced size and classic flex make it ideal for daily conditions and a wide range of surfboards.

Will this fit my board?

Yes — this fin is designed to fit surfboards with a standard US box (longboard / sliding fin box).

It is suitable for:

  • Mid-length surfboards

  • Single-fin boards

  • 2+1 setups (as the center fin)

It is not compatible with FCS, FCS II, Futures, or other plug-style fin systems.

The fin installs using standard single-fin hardware (fin plate and screw) and can be adjusted forward or back in the box to fine-tune performance.


If you're building a single-fin quiver or looking to upgrade a longboard setup, the International 4A is a go-to fin for a reason: it just works. Whether you’re cross-stepping, trimming, or drawing stylish lines, the International 4A gives you the confidence and feel to do it all.

We include

Free Delivery: Everywhere in Australia.

Tracking: Quick & easy online tracking on all fins. 

Peace of Mind: All our fins are insured against loss in transit.

Prompt Australian Dispatch: All items are sent from stock held in Sydney on the same or next business day.

Returns: 30-day, no questions asked returns, for unused full price items.

No More to Pay: No surcharges added at the checkout.

Get it faster with Express Shipping for $10 per order at the checkout.