Hewlett Packard No131A LaserJet Toner Cartridge. Black. CF210A. The HP No. 131A Black LaserJet Toner Cartridge is designed to provide you with the very finest level of quality, with eye-catching prints that are highly defined. Working in perfect tandem with your machine, HP original toner reaches levels that compatible cartridges simply cannot. Ensuring that all of your items are printed quickly without suffering from any mistakes, the cartridge is suited perfectly for the hectic demands of the modern office.