The HP 305a or HP 305x toner cartridges are compatible with a number of LaserJet Pro Color printers. You can find which printers these are in the product texts of the toner cartridges. Check this before you buy the toner cartridges. This way, you make sure you don't get toner cartridges that aren't compatible with your printer. The HP 305a toner cartridges are available as separate toner cartridges or as Combo Packs, so you never buy too much or not enough.