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Images may be a general representations of products Main Filter MF0304641 replaces OEM HR66002 by DONALDSON/FBO/DCI and is compatible in fit, form and function..Hydraulic Filter, replaces DONALDSON/FBO/DCI HR66002, Return Line, 10 micron, Outside-In Reference is made to the OEM solely to identify the compatibility of Main Filter Inc filter with the OEM filter.697inAll 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.