Fins Unlimited Bahne Longbox 10.5"

The industry standard surfboard center fin box. Also known as a "Bahne Box" it's typically used in Longboards, Single Fin surfboards, Egg and Bonzer Shapes, and as a Stand Up Paddleboard fin box. You can install a 10.5" centerfin box in a quad fin setup to make it a "Versaplane" where the fin arrangements are endless...