This is the new fin base from FCS.
You can now use FCS' new fin bases when building boards with EPS foam.
When EPS foam is glass coated with epoxy resin,
The outer epoxy resin is strong, but the EPS foam inside is weak.
If you attach the previous plug directly, you will need to reinforce the strength of the fin cup.
FCS could not be used, but unlike previous models, the base has been improved and it can now be embedded directly.
It's a perfect match for making EPS parabolic stringer boards!
