9" International 4A Center Fin – Black on Natural Pro Glass with Inlaid Carbon Fiber

Classic 4A template control with added carbon fiber response.
Precision hold, smooth trim, and reliable pivot for modern and traditional longboards.

The 9" International 4A Center Fin – Black on Natural Pro Glass with Inlaid Carbon Fiber is a refined evolution of the proven 4A longboard template. Built for balanced trim, predictable turning, and dependable hold, this fin blends traditional flow with subtle performance responsiveness.

The layered Pro Glass construction delivers consistent flex and durability, while the inlaid carbon fiber reinforcement increases longitudinal stiffness and energy return without compromising the smooth feel longboard surfers expect from a 4A profile.

At 9 inches, this size suits a wide range of longboard lengths and rider styles, offering reliable control in small-to-overhead surf. The moderate rake and full base provide trim stability, while the tapered tip allows clean, controlled direction changes from the pocket or rail.

Designed for use in a standard sliding center fin box, this fin integrates seamlessly into single-fin and 2+1 longboard setups.

Key Features

• Classic International 4A template for balanced trim and turning

• Black on natural Pro Glass layered construction

• Inlaid carbon fiber reinforcement for added stiffness and response

• Smooth, predictable flex pattern suited to longboard surfing

• Reliable hold across varied wave sizes

• Fits all standard sliding center fin boxes

• Durable build for long-term use in saltwater conditions

Ideal For

• Traditional and performance longboards

• Single-fin or 2+1 fin configurations

• Surfers seeking a balance of trim speed and turning control

• Small beach breaks through to clean point waves

• Riders wanting classic feel with subtle modern response

Choose This 9" International 4A Center Fin

The International 4A remains one of the most trusted longboard fin templates ever produced.
This Eveley version enhances that heritage with carbon fiber reinforcement, improving drive and projection while preserving the smooth, controlled feel essential to classic longboard surfing.

It is a dependable, all-conditions center fin suited to both everyday sessions and refined board setups.

Compatibility

Designed to fit standard sliding center fin box systems used in most longboards.
Not manufactured by or affiliated with other fin-box brands.

Frequently Asked Questions

Is a 9" 4A suitable for most longboards?
Yes. A 9" size is a versatile choice for many longboards between approximately 8'6" and 10'0", depending on rider weight and setup preference.

What does the carbon fiber inlay change?
Carbon fiber increases stiffness and energy return, giving slightly more drive and responsiveness while maintaining smooth flex.

Can this be used in a 2+1 setup?
Yes. It pairs well with small side fins to create a stable yet manoeuvrable longboard configuration.

Summary

9-inch International 4A longboard center fin in black and natural Pro Glass with inlaid carbon fiber reinforcement.
Designed for balanced trim, controlled turning, and reliable hold.
Compatible with standard sliding center fin boxes and suitable for single-fin or 2+1 longboard setups across varied wave conditions.