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.
Xcel Premium Stretch UV SP20 Long Sleeve Sun Shirt
Futures AM2 Honeycomb Thruster Fins
Billabong Union Wave Performance Fit Long Sleeve Rashguard
Dakine H2o Long Sleeve Surf Shirt
Futures F4 Blackstix Thruster Fins
Roxy Enjoy Waves Short Sleeve UPF 50 Women's Rashguard