Walker 14” x 3”, 3.5” and 4” Round washable filters. These specially designed high performance washable filters have a proprietary sealing design and have been engineered with a soft urethane that allows the filter to create its own gasket. The materials are depth loaded technology allowing for more dust to load the filter surface and not impede the flow like “traditional” washable filters. These filters include a galvanized expanded metal inner screen to allow maximum compression of the urethane without crushing the filter element. Greatly reduces engine wear when compared to a traditional filters.