HP ph5712 Printer Auto Duplexer ( Q5712AA2L ) Genuine HP Printer Accessory Compatible with - Color Inkjet Printers: HP Deskjet 6940 Printer series; HP Deskjet 6980 Printer series; HP Photosmart 8400 Printer series and Inkjet All-in-One Printers: HP Officejet 7200 All-in-One Printer series