Filtration Point high quality Beta 1000 Microglass filter elements are constructed with dual layers of optimized Microglass and mesh support to withstand challenging filtration applications and exacting requirements, making our replacement for Hydac 0990D001ON a true value. ¡El cost savings compared to expensive OEM brands just adds to the value. Microglass is known to have a longer life due to its lower clean differential pressure and higher dirt-holding capacity. Our filter media is backed by ISO16889 multi-pass and Dynamic Filter Efficiency (DFE) testing. This filter element can be used for filtering hydraulic fluid, water glycols, diesel, machining fluids, lubricating oil, coolants, gasoline, process fluids, turbine and compressor lube oils, synthetic lubricants, and many more chemicals. Replacement for: Hydac 0990D001ON Part numbers marked replacement are not manufactured or affiliated with Hydac. Part numbers and names are used for cross reference only.