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Filter Technical Specifications Product Media: Glass Micron Rating: 25 Seal Type: Viton Height: 3.898inAll of our elements are manufactured according to ISO specifications, including: ISO 16889, Clean DP (low and high visc) - ISO 3968, Fluid compatibility - ISO 2943, Flow fatigue resistance - ISO 3724, Dirt capacity - ISO 16889, Collapse pressure - ISO 2941All items marked "Replacement" or "Interchange" are not affiliated with the original manufacture where names and part numbers are for cross reference only.Images may be a general representations of products Main Filter MF0611820 replaces OEM RMH493420GV by NATIONAL FILTERS and is compatible in fit, form and function.Hydraulic Filter, replaces NATIONAL FILTERS RMH493420GV, Return Line, 25 micron, Outside-In Reference is made to the OEM solely to identify the compatibility of Main Filter Inc filter with the OEM filter.