HP Automatic Two-Sided Printing Duplexer Accessory C9278A-60001 For L7580 L7680 L7780 L7590 L7650 K5400DTN K5400DN C9278 Cut your paper use by up to 50 percent, save space in file drawers (and save trees) with cost-effective, double-sided printing Save time by printing double-sided documents without flipping the pages Use with plain and specialty papers, including photo, inkjet, transparency, and envelope Compatibility: HP Officejet Pro K5400, and K5400tn printers and HP Officejet Pro L7500, L7600, and L7700 Color All-in-One printers Get peace of mind with the one-year limited warranty