Xerox replacement drum unit is specially formulated and tested to provide the best image quality and most reliable printing you can count on page after page. The drum unit plays a key role in finalising the toner to paper process and ensuring that your printed output is of the highest standard. Xerox Genuine Supplies and Xerox equipment are made for each other. Compatible with Xerox Phaser 3330DNi, DNiT, Xerox WorkCentre 3335DNi, 3345DNI printers.