Replace only the cartridge that runs out in your Epson WorkForce Pro EC-4030, EC-4040, WF-4020, WF-4030, WF-4720, WF-4730, WF-4734 and WF-4740 with this individual ink cartridge. Epson's revolutionary DURABrite Ultra Ink produces prints that look brilliant on both plain and glossy photo paper. Only one set of cartridges is needed to print amazing documents and great photos. You won't need to spend additional money on specialized cartridges to print on either plain or photo paper. Cartridge yields approximately 900 pages.