E-Z Ink Remanufactured Ink Cartridge Replacement For Dell Series 9 MK990 MK991 (3 Black, 2 Color) Brand: E-Z Ink All cartridges remanufactured using ISO 9002 Certified Process Cartridges have undergone an extensive process which includes: cleaning of all dry/excess ink, re-filling cartridge to OEM capacity, and testing to ensure quality and compatibility All products covered by a 100% satisfaction guarantee and 1 year warranty