HOTCOLOR 1 Pack Black/Yellow C9381A 88 Printhead Compatible for K550 K8600 L7480 L7550 L7590 Printer Packing List: 1 Black/Yellow 88 Printhead Compatible with: Photosmart 428 Digital Photo Inkjet Printer; CB821A Printer; OfficeJet Pro L7590 All In One Laser Printer; All-in-One C8189AABA All In One Inkjet Printer; OfficeJet Pro K8600 Printer; Officejet Pro K5300 InkJet Printer Compatible with: Officejet Pro K550dtwn Inkjet Printer; Officejet Pro L7780 All In One Inkjet Printer ; Officejet Pro K550dtn Digital Photo Laser Printer; Officejet Pro L7680 All In One Inkjet Printer; Officejet Pro L7650 All In One Inkjet Printer; Compatible with: Officejet Pro L7680 Workgroup Inkjet Printer; OfficeJet Pro L7580 All In One Inkjet Printer Officejet Pro K5300 Workgroup Laser Printer; Officejet Pro K5400dn Workgroup Inkjet Printer; Officejet Pro K5400dtn Label Inkjet Printer; Guarantee: 120 days quality warranty.If there is any problem,DO NOT hesitate to contact us.