ND Brand Dinsink 4x4oz Premium Dye ink refill kit for Lexmark 44 ink cartridge and Lexmark X6570, X7550, X7675 inkjet printers 4x4oz ND Brand premium water-based dye ink for Lexmark 44 ink cartridge Easy refilling! Big saving! Stability: No setting in 3 years (at normal storage) Temperature: -15C no frozen and 70C no gelling Lightfastness: 5-6 BWS; Waterfastness: 3 (Average); Gasfastness: 4 (Good).