The Back-up Ring (OEM Part No. 4350265010) is a steel sealing support component designed to help retain and protect sealing elements in mining and drilling equipment. It is compatible with FlexiROC D65 LF, Simba E70, Simba M4C, DHR6H-SH,PowerRoc-D55. The back-up ring supports the sealing assembly and helps prevent seal deformation or extrusion under operating conditions. Manufactured for aftermarket replacement applications, it is suitable for maintenance and repair of hydraulic or mechanical sealing assemblies in demanding drilling environments.