The Epson 604XL black ink cartridge contains 8.9ml of ink, a larger volume than the other colors in the same series. It's part of the Epson 604 series, available in this high-capacity version that yields more pages per cartridge than the standard version, reducing the frequency of replacements for regular printers. It is compatible with Epson Expression Home XP-2200, XP-2205, XP-3200, XP-3205, XP-4200 and WorkForce WF-2910, WF-2930, WF-2935 and WF-2950 printers. It's a preferred option for those who print large volumes of text on these printers.