The real power in this model is it allows prediction of the transmission properties of many metallic grids stacked together with spacers to form interference filters. Stacks of capacitive grids make a low-pass filter with a sharp frequency cutoff above which transmission is almost zero. Likewise, stacks of inductive grids make a high-pass filter with a sharp frequency cutoff below which transmission is almost zero. Stacked inductive and capacitive meshes can be used to make band-pass filters.