6 Pack Polyester Air Filter Element, part number: A425 which is a replacement for the P05050A. This works with Champion, Gardner Denver, as well as many other reciprocation and small rotary screw air compressors. This polyester element filters dust, smoke, oil spray, and other contaminants from entering your air compressor intake. This filter can be washed up to 3 times by using warm water and light detergent. This is a 5 micron filter which is higher quality than paper filter elements. Specifications: Inside Diameter: 3" Outside Diameter: 4-3/8" Height: 2-5/16" High-Quality Polyester Element Rubber Seal On Top / Bottom Inner Steel Mesh Center 5 Micron Filter Washable Up To 3 Times