HP 88 black ink produces crisp, black text every time at fast speeds. HP's proprietary ink is specifically designed to keep pace with you in the office. Get rich, deep blacks with pigment-based black ink, crisp, sharp text with more accurate drop size & placement & quick-drying for consistent results at fast print speeds & high volumes. HP Smart Printing technology in HP supplies & your printer ensures reliable, consistent results by making automatic adjustments that optimize print quality. Cartridge is designed for use with HP Officejet Pro K550, K550dtn, K550dtwn, K5400, K5400dtn, K5400tn, K8600, L7580, L7680, L7780 & L7590. Cartridge yields approximately 850 pages.