The X20 Cartridge is a steep pore gradient, depth filter designed to have a large dirt loading capacity. The X20 measures 5.5" in diameter, with a length of 23.25", yielding a total cartridge volume of 500 cubic inches. In laboratory tests, the X20 has outperformed standard 10" cartridges by holding 20 times the volume of dirt.The design of the X20 Polyseal Cartridge features a single open end that directs fluid from outside the cartridge in through the filter. A built-in handle on the cartridge top assists in seating and removing the X20. The cartridge bottom is equipped with FSI’s patented Polyseal End Fitting to ensure a by-pass-free sealing without the need for double O-rings or flat gaskets. Fitting securely into the cartridge plate, the X20 does not require springs, hold-down plates or center posts.