FCS2 FCS 2 BM Specialty Twin Fin Britt Merrick Signature Twin Fin Retail price 17,820 yen (tax included), selling at a bargain price of 14,520 yen with free shipping. This is the largest template fin in the FCS series. It sits on the boundary between twin and keel categories. This fin provides stability not found in typical twin fins, especially during long, sweeping turns and bottom turns. Specifications: Performance Glass Size: XL Specialty Twin Set of 2