The HP 201 toner cartridges belong to a number of HP Color LaserJet Pro printers. You can see which ones in the product text of the toner cartridges. Read this carefully before ordering the toner cartridges for your printer. There is a chance that you need other ones. The 210 toner cartridge line consists of various series, so there is also a difference. The toner cartridges are available in separate colors, so you never order more than necessary.