This HP ink (and HP Officejet Pro 6968 printer) is a joke. I recently bought this HP black ink which says it prints 300 pages and I have less than ten. Now my HP printer is reporting low ink. This is a brand new HP Officejet Pro printer that I bought in December. I printed less than 50 pages and ran out of black ink so I bought this ink cartridge to replace thinking it would last a few months as it claims to print 300 pages. Less than ten pages later, it says that the ink is running out and needs to be replaced. Terrible!