I have an hp Envy 4500 printer - when I put it in the printer, I saw the following inscription: "The indicated cartridges are not intended for use in this printer". I always buy 61 and it has worked so far!
Loading the REAL HP cartridges was a breeze, unlike trying to load those fakes packaged in HP looking boxes. I know my HP printer is happy because it effortlessly produces immaculate pages. When looking to purchase replacements, be sure to read descriptions very carefully.