This 6,000-page print cartridge has been specifically designed to provide optimum print quality for the Optra E310 / E312 /E312L laser printers. By providing a 140% larger toner capacity than its major competitor and by offering a competitive purchase price, the value of the Optra E310 / E312 /E312L supply is unbeatable. In addition, the all-in-one design of the print cartridge assures easy, clean installation and removal.