6" International 4A Center Fin in Midnight Purple Pro Glass.

Depth 6” Base 4.6”

This robust fiberglass fin with a machined finish is equipped with a screw and plate ready for easy secure installation.

The 4A Center Fin remains the most trusted surfboard fins template. Discover how it delivers unmatched balance, speed, and control in all conditions.

Learn what Pro Glass surfboard fins are and why surfers prefer this fiberglass construction. Discover how Pro Glass fins improve drive, control and durability.

Learn how the sliding center fin box works for surfboard fins. Understand fin installation, adjustment, and how fin position changes surfboard performance.

Free Delivery: Everywhere in Australia and NZ.

Tracking: Quick & easy online tracking. 

Peace of Mind: Insured against loss in transit.

Prompt Australian Dispatch: Sent from stock held in Sydney.

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

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

Express Delivery: Just $10 per order.