One new air compressor intake filter polyester element, part number AP425. This replacement filter is a common filter used on many brands of compressors, it is 2 1/4" tall, 4 3/8" outside diameter and 3" inside diameter. The filter element is made with a heavy duty polyester material surrounded by a galvanized mesh screen, with a foam pre-filter which is removable. This is a top quality filter and has a 99% filtration efficiency.