Nelsen/Enpress CT-5020, 50 Micron to 20 Micron Sediment FilterThe Orange Filtration Series are dual gradient double pleated filtration solutions for extended life and use, with filtration levels of 5, 10 and 20 microns. The filters are designed with a larger pre filtration layer externally and the smaller internally, extending filtration level contamination and service life, while achieving high flow and low pressure drop. CT 5020 External 50 Micron Pleated pre filter, with 20 Micron Pleated Internal Filter