RTi's patented Inverse-Flow® filter-dryer with four (4) stage filter packing, including an activated carbon packing backed by a cotton/polyester packing. Excellent water, dirt, and oil aerosol capture to 1 micron. ISO Class 1 for Particulate/Oil.

Two (2) stage assembly which combines an oil extractor with a high efficiency coalescer to give the best oil and fine particulate capture, in addition to heavy water removal. 99.99998 % efficient at 0.01 micron and to 0.003 PPM. ISO Class 1 for Particulate/Oil.