Large Geometry Pleated Filters for High Flow Graver GF Series filters feature microfiberglass media in a larger geometry to handle higher flows with fewer filter elements. The result is much faster, easier filter change outs. In addition, the inside to outside flow allows for excellent dirt holding capacity, extending the time between filter change outs. Filter housings are also available and because of the filters high flow and dirt holding capacity, smaller systems are possible, reducing upfront capital costs.