ND Brand Dinsink 4x4oz Premium Dye ink refill kit for Lexmark 43 44 ink cartridge and Lexmark X4850, X4875, X4950, X4975 inkjet printers Plus 4 syringes and 1 drill 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).