 It is not only used for research and development firms but for larger companies as well in the production of a Membrane Electrode Assembly (MEA) that is in most cases used in a fuel cell or battery apparatus.Companies that specialize in high volume production of GDE include Johnson Matthey, Gore and Gaskatel.However, there are many companies which produce custom or low quantity GDE, allowing different shapes, catalysts and loadings to be evaluated as well, which include FuelCellStore, FuelCellsEtc, and many others.