This is a new filter element AP428 its a top quality paper air compressor intake filter element with a pre filter. This filter is made with a paper element surrounded by a mesh screen on both sides. Also included is a pre-filter on the outside of the filter that can be removed and cleaned for a longer filter life. Measurements: Height: 4.75" Inside Diameter: 3" Outside Diameter: 4.38" High quality paper filter element with pre filter.