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Hydraulic Filter, replaces DENISON DER171B2C05, Return Line, 5 micron, Inside-Out Reference is made to the OEM solely to identify the compatibility of Main Filter Inc filter with the OEM filter.961in OD Bottom: 4.409inAll 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 MF0833273 replaces OEM DER171B2C05 by DENISON and is compatible in fit, form and function.