This genuine Epson C13T40D440 ink cartridge is the high capacity yellow cartridge for the SC-T3100 and SC-T5100 inkjet printer series. Containing a full 50ml of Epsons highest quality yellow ink, the T40D4 works out a cost effective purchase for most users.Designed for large format printers, the original Epson C13T40D440s substantial size is for a good reason. Although it is not possible to give an estimated page yield for the T40D4 or similar Epson cartridges, this whole range is one way to keep printing costs low without compromising on quality.