This Epson compatible 378XL T3791 black is a great value ink cartridge specifically designed to work in your Epson printer. The Epson 378XL T3791 ink black cartridge is a replacement compatible non-oem cartridges. The 378XL T3791 printer cartridge black is suitable for all types of printing and is the best single black cartridge we offer. Fully chipped and ready to go. All our compatible Epson premium inks are made to highest standards and carry the ISO9001 worldwide quality certification. Our inks are formulated to each printer?s individual specification ensuring perfect results every time. Offering a much higher printing quality than universal inks. Which are unfortunately widely used in the UK by other inferior cartridge manufacturers and distributors. The 378XL T3791 black is filled to 13ml and prints approx 580 pages at 5% average coverage. That\\\'s a bigger fill than the black original XL original ink cartridge and TRIPLE the standard fill. This cartridge works as both a T3781 & T3791. Easy to use install and saves over? 20 buying the equivalent XL genuine black. These compatible Epson 378XL T3791 ink cartridges have been tried and tested and offer great premium value printing and are only available from Internet-ink. We offer you great value with the Epson 378XL T3791 cartridges with a full all-round service and 1 year guarantee to make sure you get the best value and savings from buying your cartridges with us! Don\\\'t forget to use your 10% discount code which we give to our regular customers to save you even more! We advise buying a full pack if you have not ordered these cartridges before and install a full set of compatibles. These cartridges may not work when mixed with genuine cartridges in your printer. XP-15000,XP-8500,XP-8505,XP-8600,XP-8605