Fluoride channel required for the rapid expulsion of cytoplasmic fluoride. Highly sensible to fluoride, but not to other halide salts. The growth of a double deletion of both FEX1 and FEX2 is inhibited at almost a 1000-fold lower fluoride concentration than in the wild-type. Has increased intracellular fluoride concentrations. Present with 220 molecules/cell in the plasma membrane. Belongs to the fluoride exporter Fluc/FEX family.