Printronic Remanufactured Ink Cartridge Replacement for HP 40 51640A (1 Black) Brand: Printronic Individually factory sealed with Printronic labeling Remanufactured under strict standards One year factory warranty against product defect **PLEASE BE AWARE THAT DUE TO PRINTER PROGRAMMING THE INK LEVEL FOR THIS PARTICULAR CARTRIDGE MIGHT DISPLAY EMPTY ON THE PRINTER HOWEVER THE CARTRIDGE IS FULL**