This NEW SEALED IN BOX Xerox 097S04400 550-Sheet Feeder is a high-quality printer accessory designed specifically for Xerox printers, including the Phaser 6600 and WorkCentre 6600 series. This feeder unit adds a large capacity to your printer, allowing you to easily handle and process up to 550 sheets of paper at a time. With this product, you can streamline your printing processes and enhance the efficiency of your Xerox printer.