Does it matter what number ink cartridge you buy?
YOU NEED TO BUY THE NUMBER THAT MATCHES THE MODEL AND BRAND NAME OF YOUR PRINTER.
IT SHOULD TELL YOU INSIDE YOUR PRINTER WHERE THE INK CARTRIDGE GOES OR YOU CAN GO TO A STORE WEBSITE AND FIND THE ONE THAT FITS YOUR PRINTER BY PUTTING IN THE BRAND NAME AND MODEL, WHICH SHOULD BE PRINTED ON THE OUTSIDE OF YOUR PRINTER..
Can I use HP 63 instead 62?
The HP 61 and the newer HP 62 , HP 63 , HP 64 and HP 65 cartridges may look very similar but are not compatible and are not interchangeable.
Can I use HP 64 instead 63?
The answer is no, even though they look similar and will likely fit inside your printer, they will not print if installed in the wrong printer. HP 63 cartridges will not work in a printer that uses HP 64 cartridges.
Are HP 304 and 305 the same?
HP has two different black ink cartridges in the HP 305 range. The standard capacity black ink cartridge has 2ml of ink inside whereas the HP 305XL black has 4ml inside.