This genuine Epson Black T7891 Inkjet Cartridge is packed with 65.1ml of black ink for an exceptionally high print yield up to 4,000 pages. DURABrite Ultra ink ensures bright and crisp results, every time. It's compatible with the WorkForce Pro WF-5110DW, WF-5190DW, WF-5620DWF and WF-5690DWF.