600ml 20oz bulk black ink for Epson T0731 cartridge This package includes 6 bottles of black 100ml dye ink which have been formulated to match your printer that uses Epson T0731 cartridges. They work best for our T0731 refillable cartridges. Each bottle comes with a funnel shape opening to facilitate easy refill. Our refillable T0731 cartridge holds up to 14ml of ink and this pack of bulk ink can fill it for approximately?42 times. This is like buying 42 pieces of T0731 cartridges for $20. Imagine how much money you will save! The official shelf life of the ink is 2 years. If you store it in a dark and cool place, it should last about 5 years without any degradation in quality. If you also need color inks, please look at our T0731 ~ T0734 combo bulk ink pack. Due to the liquid content this package can only be shipped within the USA and Canada.