HP C9385AN Black Ink Cartridge: Print technology/print color * Print technology: HP Thermal Inkjet * Cartridge colors: Black * Ink types: Pigment-based * Ink drop size: 9 pl * Print head nozzles: 2112 Volume* Page yield black: 850 pages Hardware compatibility* Compatible hardware: HP OfficeJet Pro K550, K550dtn, K550dtwn Environmental specifications* Operating humidity: 20 to 80% RH * Non-operating humidity: 20 to 80% RH * Operating temperature (Fahrenheit): 59 to 95 ° F * Storage temperature (Fahrenheit): 59 to 95 ° F Dimensions/weight/warranty* Package dimensions: 4.6 x 1.04 x 6.2 in * Package weight: 0.19 lb * Warranty, standard: HP"s inkjet print cartridges, ink cartridges and printheads are warranted to be free from defects in materials and workmanship during the period of the warrant