4.6" Twin Keels – Melon Pro Glass | Futures Compatible (Set of Two)

Futures compatible Depth 4.6” Base 6.2” Foil: flat inner face Tab: 3/4”

The 4.6" Twin Keels in melon Pro Glass are a matched pair of large-base twin fins engineered for traditional twin-fin surfboards and modern retro fish designs.
The keel template emphasizes surface area and rake to generate sustained down-the-line speed while maintaining predictable hold through extended turns.

Pro Glass fiberglass construction provides a balanced flex pattern suited to clean carving and drawn-out transitions rather than abrupt release.
The Futures-compatible base ensures secure installation in standard Futures side fin boxes.

Key Features

• 4.6" twin keel template with extended base for speed and projection

• Melon-tinted ProGlass fibreglass construction

• Smooth, controlled flex suited to carving turns

• Balanced hold for retro fish and twin-fin outlines

• Futures-compatible base

• Supplied as a set of two fins

Ideal For

• Retro fish and traditional twin-fin surfboards

• Small to medium clean surf conditions

• Surfers seeking speed, glide, and drawn-out turning arcs

• Riders preferring smooth rail engagement over pivot-style response

Why Choose This Product

This twin keel set prioritizes continuous speed generation and predictable control.
The Pro Glass layup delivers consistent flex behavior, while the keel outline enhances glide and stability in flowing surf.
It is suited to surfers who value trim speed and classic twin-fin response rather than tight vertical manoeuvres.

Compatibility

• Designed for Futures side fin boxes

• Not intended for FCS or FCS II systems

• No center fin required for standard twin-fin configurations

Frequently Asked Questions

Are these fins suitable for all twin-fin surfboards?
They fit surfboards equipped with Futures side fin boxes and designed for twin-fin use. Board dimensions and outline will influence overall feel.

How does a keel template differ from upright twin fins?
Keels have a longer base and more rake, producing greater speed, hold, and drawn-out turns, while upright twins pivot more tightly.

What conditions work best with twin keels?
They perform best in small to medium clean waves where trim speed and smooth rail flow are prioritised.

Summary

4.6-inch twin keel surfboard fins in melon-tinted Pro Glass, supplied as a Futures-compatible pair.
Large base and raked template provide speed, hold, and smooth carving suited to retro fish and traditional twin-fin boards in small to medium clean surf.

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.

Express Shipping just $10 per order at the checkout.