Mark Richard"s Signature Series performance core twin template, the FCS MR-TFX PC Twin/ Tri Fin Set features an advanced foil plus a dynamic stabilizer for maximum performance in twin, super twin or fish options. Performance core construction is designed to deliver the feeling of a traditional fiberlgass fin with the added performance of reduced weight. The RTM (Resin Transfer Moulding) process produces a lightweight fin with remarkable flex, a smooth feel, and an impressive aesthetic. MR"s template with stiff carbon base for twin, super twin or fish set ups; available with a dynamic stabilizing center fin.