To fill the gap between the front tab of the original (dual tab) FCS fin and the front of the FCS II plug front slot.
FCS II Performance Glass Power Twin Fins
$85.00
Futures HS2 Hayden Shapes Generation Series Tri-Fins
$105.00
Billabong Core Zip Front Long Sleeve Rashguard
$49.95
FCS II Connect Performance Glass Longboard Fin - 9"
$75.00
FCS H-3 Nexus Tri-Fin Set, Medium
$110.00
Churchill Makapuu Pro Fins
$73.99
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