The Bosch Rexroth R901006183 / R900737321 is a high-performance proportional pressure relief valve push rod assembly, complete with a proportional relief valve core. Engineered for demanding industrial hydraulic applications, this component ensures highly precise pressure control with a robust rated working pressure of up to 315 bar. The assembly is constructed with a highly durable, cylindrical hardened steel body featuring a threaded mounting end for secure and seamless installation into your hydraulic manifold or valve block. It is equipped with premium elastomer O-ring seals to provide excellent leak prevention, alongside a high-quality brass guide bushing and a rounded black tip for smooth, frictionless operation. Authentic Rexroth part numbers (R901006183 and R900737321) are prominently engraved on the body and top face, guaranteeing genuine OEM compatibility, precision engineering, and long-lasting reliability.