The JCB 90321173 is a genuine PTFE Anti Extrusion Ring designed for use in JCB machinery, primarily within hydraulic cylinders. This critical component prevents the extrusion of the main seal under high pressure, thereby extending the lifespan and maintaining the efficiency of hydraulic systems. Made from durable PTFE material, it offers excellent chemical resistance and low friction properties, ensuring reliable performance in demanding agricultural and construction environments. This OEM part guarantees compatibility and optimal function with specified JCB models.