This is the 950ml Titanium Black. Titanium black is designed to work in ALL inkjet cartridges, and is the ink of choice by most artists that are looking for a "cooler" black. Titanium black lends a shiny, almost glossy look to your black prints.
950ml bottle is enough for many refills, the average black inkjet cartridge holds about 20ml of ink, so with this 950ml bottle you will get about 50 refills on the average cartridge by HP, Lexmark or Dell, or even more (up to 100 refills) on cartridges that hold lesser amounts of ink (like Epson, Canon etc). True value for the high volume printer.