Package Content: Black Print Head(X4E75A) ,Tri-colour Print Head(M0H50A) Replacement for HP 517 532 617 515 508 510 511 518 519 531 538 610 618 550 570 650 Printer Product Type:Tank system Printhead X4E75A M0H50A Print Head Use for HP Smart Tank 500/510/530/610 Series and Smart Tank Plus 550/570/650 Series Easy to install : The detailed replacement steps are in the description X4E75A M0H50A PrintHead Smart Tank Plus 651 Print Head Use for 517 532 617 515 508 510 511 518 519 531 538 610 618 550 570 650 Printer