HP933 and hp 95o,951.
They all show my printer model number on the pic. What is the difference?
Hp 933 is the universal ones. But the structure of hp 933 is different from hp 950,951. For your printer, please take the 950 and 951. They are the compatible one. http://www.123inkcartridges.ca/search_plus?utf8=✓&q=HP+officejet+pro+8100&commit=?utm_source=shopperplus&utm_medium=forum&utm_campaign=crystal