Will this fin work in an old windsurfer that has a US box? What are dimensions of base that drops into the box or slot?

This fits in a standard US fin box that is about 10.5" long.

will this fit an inflatable aqua marine sk2?

No it does not, for the Aqua Marina SPK-2 you need the SBS 9" iSUP Fin here amazon.com/dp/B06XB4RQD1/

Will this fit an 8’ emotion crush stand up paddleboard?

It will fit any standard long center fin box. (What used to be called a "Bahne" or "Fins Unlimited" box.

Is the compatible with imagine surf paddle boards?

We have found the Imagine Icon needs our 7.5" fin instead of this one. We don't know about the other boards though.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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SBS - 8 inch Longboard & SUP Single Fin - 8" Center Fin for Surfboard & Paddleboard

Product ID: 19078055

Details

Brand
Santa Barbara
Color
Black with
Item Weight
0.25 kg
Material
Fiberglass
Sport
Surfing

🌊Universal SUP & longboard fit

🔧No-tool quick install

🦾Glass-filled nylon strength

EC$93

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Ride Ready, Tool-Free, and Built to Dominate Every Wave!

BUILT TO LAST - Durable glass-filled nylon construction for peak performance wave after wave.
TOOL FREE SETUP - Includes no-tool fin screw & plate for instant installation—get in the water faster.
EFFORTLESS UPGRADE - Direct replacement for 8.5" & 10.5" fin boxes—no hassle, just ride.
VERSATILITY UNLEASHED - Perfect for longboards, SUPs, and tri-fin setups—one fin to rule them all.
PRO GRADE COMPATIBILITY - Fits 99% of SUPs including top brands like BIC and Tower—never miss a session.

The SBS 8" Longboard & SUP Single Fin is a robust, glass-filled nylon fin designed as a direct replacement for most standard 8.5" and 10.5" fin boxes. Compatible with 99% of SUPs and longboards, it includes a no-tool fin screw and plate for quick installation. Ideal for surfing, noseriding, and flat water touring, this fin delivers durable performance and versatility across multiple board types, making it a must-have upgrade for serious paddlers and surfers.

Specifications

ASIN	B0145KHIYG
Age Range Description	Adult
Best Sellers Rank	#36,173 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Surfing Fins
Brand Name	Santa Barbara Surfing
Color	Black with Logo
Customer Reviews	4.6 4.6 out of 5 stars (501)
Item Dimensions L x W	120"L x 48"W
Item Weight	0.25 kg
Manufacturer	Santa Barbara Surfing
Manufacturer Part Number	SBS-5104
Material Type	Fiberglass, Nylon
Model Number	SBS-5104
Operator Skill Level	All
Shape	fin
Sport Type	Surfing
UPC	029741495609
Unit Count	1 Count

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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EC$93

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Saint Vincent and the Grenadines.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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