"Below is the list of various standard five layer Membrane Electrode Assemblies (MEAs) that are offered by Electrodesandmore.com. Five layers consists of two gas diffusion layers, anode and cathode layers and a proton exchange membranes. Variations are available to each of the layers and also its components. We can also supply with variety of sizes to meet your need. If you do not see a 5 layer MEA in the list feel free to submit your requirements by clicking ""Custom Product"" on the top of this page."