The GEA | 1st & 2nd Stage – O-ring (9531-4001-591) is an OEM GEA replacement component (GEA part number 9531-4001-591) for GEA PandaPlus and X-Stream high-pressure homogenizer systems used in nanoemulsion and nanoemulsification production. GEA OEM parts ensure correct fit, material compatibility, and performance in accordance with GEA’s validated process specifications. Contact Root Sciences with your GEA homogenizer model and serial number to confirm compatibility before ordering.