This hydraulic filter element is an original part from the manufacturer. It is installed in the valve plate of the host machine, where it removes particulate contamination from the hydraulic fluid before it circulates through the system. A clogged element restricts flow, which can cause sluggish actuator response and increase wear on pump components. The filter is designed to match the housing's seal geometry so that the bypass valve seats correctly and does not crack open prematurely. Replace the housing seal on reinstallation.