7.5" International 4A Center Fin in Bone Pro Glass.

Shop the 7.5″ International 4A surfboard fin in Bone Pro Glass — classic drive and flowing turns from Eveley fins, with free Australian delivery.

This surfboard fin from Eveley fins combines a generous base for drive with a tapered tip for responsive turning, making it a versatile choice for surfers comparing center fins for midlengths and suitable longboard setups.

The International 4A’s swept-back outline encourages smooth, arcing turns and connected rail-to-rail transitions. Made in Bone Pro Glass with a machined surface, this 7.5″ fin brings classic styling and practical everyday performance to your board.

• Choose it for: Flowing trim, drawn-out turns and a balance of drive and manoeuvrability.

• Board suitability: Midlengths and longboards where a 7.5″ center fin suits the board, rider and intended setup.

• Setup options: Single-fin use or a 2+1 configuration, depending on your board and side fins.

• Ride feel: A supportive base with a more responsive tapered tip.

• Fitting: Sliding center fin box; screw and plate included.

• Delivery: Free tracked, insured delivery throughout Australia, dispatched from Sydney.

Is 7.5″ right for your board? Consider board length, tail width, rider weight and whether you use side fins. For a dedicated noseriding setup, compare larger center fins before choosing this size.

Technical Specs

• Brand: Eveley Surf

• Model: International 4A

• Fin type: Center surfboard fin

• Height (depth): 7.5 inches / approximately 191 mm

• Base length: 5.5 inches / approximately 140 mm

• Material: Pro Glass fibreglass

• Colour: Bone

• Finish: Machined

• Shape: Swept-back outline with a broad base for drive and a tapered tip for responsive turns

• Fits: A sliding center fin box

• Included: One fin, plus a fin screw and plate

The base provides support through turns, while the tapered tip helps the fin respond as you change direction. Its adjustable position in a sliding center fin box lets you fine-tune the balance between turning freedom and directional stability.

Eveley Surfboard Fin Knowledge Hub

Choose and tune your center fins with these practical guides:

• Surfboard Fins Australia — Complete Buyer’s Guide — compare fin types, materials and setups.

• The 4A Center Fin — Design and Performance Explained — understand the template behind the International 4A.

• How to Choose the Right Longboard Center Fin Size — match fin size to your board and surfing.

• Longboard Fin Placement Explained — explore how moving your fin changes the ride.