Channel Islands Fins - Tech 1 Large - Sea Foam Green

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Channel Islands

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Family Owned Since 1980. Online since 1999.



The Tech 1 Large Fin is a widely popular performance fin template from legendary shaper Al Merrick. This large template provides tons of drive without compromising powerful maneuvers in critical sections. Available to you in Tech 1 construction and made in the USA by none other than Channel Islands Surfboards.


  • Size: Large
  • Fins in set: 3
  • Ideal Conditions: Designed with riders 165lbs and over in mind
  • Material: Time-tested polyester resin and fiberglass construction. Unique core construction reduces resin content and weight
  • Performance: Tech 1 proprietary fiberglass weave and orientation is designed for maximum response and performance in a fiberglass fin. Al's design creates drive from the rake and base, while allowing pivot with the narrow tips and smaller center fin.

Tech Specs

Center Fin:

  • Height: 4.48 in
  • Base: 4.61 in
  • Area: 15.20 sq in
  • Foil: 50/50

Side Fins:

    • Height: 4.72 in
    • Base: 4.63 in
    • Area: 15.93 sq in
    • Foil: Flat


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    Returns are easy! We understand that in some situations returns or exchanges may be necessary. We also want you to be stoked on your purchase. If you are not 100% satisfied with your purchase you may return it for a full refund, or exchange within 30 days of receiving your order. Items must be in new condition with original tags and packaging.

    Click here for our full Return Policy