HP's 901 OfficeJet Ink Cartridge delivers high-quality laser prints for an affordable price. The ink produces sharp documents, crisp pictures and long-lasting results that resist fade. This HP cartridge has a dynamic function that completes critical jobs even when you're low on a specific ink. So, if you run out of colour ink mid-print, it will automatically use the black to complete the job. Such seamless functionality is ideal for people on the move. This is compatible with the Officejet 4500, 4500 G510, J4525, J4540, J4550, J4580, J4585, J4640, J4660 and J4680 printers.