Genuine Hewlett Packard black inkjet for Deskjet 5740, 5740xi, 5904, 6520, 6520xi, 6540, 6540dt, 6540xi, 6620, 6830, 6840, 6840dt, 6840dt, 6840xi, 6940, 6940dt, 9800, 9800d, Officejet 7210, 7210v, 7210xi, 7310AIO, 7410, 7410xi, Potosmart 2600, 2610,. 2610v, 2610xi, 2710, 2710xi, 8050, 8050v, 8150, 8150v, 8150xi, B8350, 8450, 8450xi, 8750, PSC 2610, 2710.