Royal Filter offers the RL-AB series cartridge for high efficiency removal of particulates from liquids when a Absolute rated, high efficiency filter is required. These filter elements are constructed with a special glass-cellulose media. The high glass content of the media allows these filters to insure high flow rates and efficient filtration in water based fluids, chemicals, or petroleum based fluids. The RL-AB elements are ideal for product cleanup when extremely fine particles are present and nominal filtration is just not good enough. Sizes are available to replace many existing nominal cartridges. These cartridge are available in 0.5 and 1 micron ratings.