Genuine OEM HP LaserJet Pro MFP M521dn Toners

The LaserJet Pro MFP M521dn accepts HP 55A standard-yield and HP 55X high-yield toner. The 55X prints more pages per cartridge, while its dual pack gives you two separate high-yield cartridges to use one after the other.

Toner Buzz offers genuine HP 55A and 55X black toner as singles, plus the 55X two-pack. Choose 55A for lighter use or 55X for frequent printing; the pack adds a high-yield spare.