The Epson WorkForce Pro WF-M5899 uses black ink in one size, the ultra high yield T12H120 (T12H), which is rated for about 10,000 pages. This compatible ink replaces the Epson T12H120. The same ink also works with the Epson WorkForce Pro WF-M5399.
Epson WorkForce Pro WF-M5899 Ink Cartridges
