Philips PFA441 inkjet cartridge black for use in IPF525/IPF555 fax machines. Philips inks are manufactured to high standards and undergo rigorous testing to ensure they deliver top quality results for each and every print. Ideal for users printing on a regular basis, the IPF525 Black Inkjet Cartridge offers consistently reliable output from the first page to the last. Contains smudge-resistant and fade-free ink to produce professional grade yield across the entire life cycle of the cartridge. Easy installation features mean this cartridge fits your machine in a matter of moments, reducing the downtime between jobs and increasing productivity.