The fin is simply pushed into the fin box and secured with the small pin on the strap. Compatible manufacturers are for example for F2, Fanatic, Bluefin, Red Paddle, Makaio, Mistral. non original.
eBay
4.5/8/9/9.5/10 inch Surf Water Wave Fin Nylon Paddle Board Fin Stand Up Paddleboard Surfboard Slide-in Fin Surfing Accessories
Aliexpress UK
Feature: 1. Streamlined Design: Inflatable paddle board fin adopts the unique streamlined design can increase directionality and stability. Item Type: Surfboard Fin. 1 x Slot 1 x Surfboard Fin. If you do not receive our reply within 48 hours, pls.
eBay
Big SUP Single Fin and Small side fin Detachable Fin for Longboard, Surfboard and Paddleboard Replacement Quick Fin.
Aliexpress UK
Suitable for standard surfboard tail box. 1 x Spring Screw. Spring design, firmly installed and not easy to loosen. Made of stainless steel, durability and functional. Material: Stainless steel.
eBay
Adjustable Stand Up Surfboard Shoulder Strap Portable Carry Sling Paddleboard Surf Board Surf Fins Paddle Wakeboard Kayak Tool
Aliexpress UK
It can effectively increase the stability and handling of the surfboard. Unique curved streamline design, suitable for surfboards and canoes.
eBay
Adjustable Surfboard Shoulder Strap Carry Sling Stand Up Paddleboard Surf Board Surf Fins Paddle Wakeboard Surfing Kayak Tool
Aliexpress UK
Designed to be inserted into the tail of your surfboard or kayak, this detachable fin provides exceptional stability and enhanced maneuverability. Say goodbye to wobbling and enjoy a smooth ride even in challenging conditions.
eBay
Surfboard Shoulder Carry Sling Adjustable Surfboard Straps for Stand Up Paddleboard Sup Board Surf Fins Paddle Wakeboard Kayak
Aliexpress UK
Suitable for longboard / surfboard / stand up paddle board. Suitable for longboard / surfboard / stand up paddle board. Slide and lock fin box system, removable center fin for inflatable paddle boards.
eBay
Adjustable Surfboard Shoulder Carry Sling Stand Up Paddleboard Strap Sup board Surf fins paddle wakeboard surfing kayak Unisex
Aliexpress UK
【Wide Application】This central fin is not only suitable for surfboards, but also can be installed on kayaks, canoes and pedal boats. The operation is very simple. Stick the fin base of the surfboard to the rear end of the surfboard, and then insert the fin into the base.
eBay
Adjustable Carry Shoulder Strap Sling Stand Up Board Surf Surfboard Sup surfing Paddleboard Unisex water sports diving boat fins
Aliexpress UK
【Wide Application】: Slide fin accessories are suitable for longboard, surfboard, and stand up paddleboard, providing good hold in both flat waters paddling and turning around. 1 Surfboard Fin. 【Ideal Accessories】: A wonderful accessory for surfboards, provide stability, balancing steering maneuvers, and traction;.
eBay