This genuine Epson Black 79 Tower of Pisa Inkjet Cartridge is packed with 14.4ml of black ink to print up to 900 pages. DURABrite Ultra ink ensures bright and crisp results, every time. It's compatible with the WorkForce Pro WF-4630DWF, WF-4640DTWF, WF-5110DW, WF-5190DW, WF-5620DWF and WF-5690DWF.