Air filters install into the supply lines of compressed air systems to remove water, dirt, oil, and other contaminants from the air. They improve the performance of the downstream components and equipment and prevent damage and corrosion. FRL compressed air filters refer to a modular system comprised of a filter, a regulator, and a lubricator. FRLs treat the compressed air before it is delivered to downstream equipment, or the point of use. Main line compressed air filters are installed on the primary air supply line after the air compressor. Miniature compressed air filters are compact, lightweight and attach directly to an air tool. Disposable compressed air filters can be disposed of when in need of replacement, reducing maintenance and cleaning. Sterile compressed air filters have a high filter efficiency rating for removing contaminants including viable organisms such as bacteria and mold.