The New SEALED Xerox Phaser 4500 Duplex Duplexer Upgrade Kit 097S03128 is a genuine Xerox product designed to upgrade the duplex unit in Xerox Phaser printers. Specifically designed for the Xerox Phaser 4500 series, this kit includes all the necessary components to enhance the printer's functionality and enable duplex printing. With the trusted Xerox brand behind it, users can expect high-quality performance and reliable operation from this upgrade kit.