These printers use the CE255X cartridge:
Click On a Printer to View it's Cartridges
          HP LaserJet P3011
          HP LaserJet P3015
          HP LaserJet P3015D
          HP LaserJet P3015DN
          HP LaserJet P3015N
          HP LaserJet P3015X
          HP LaserJet P3016
          HP LaserJet Enterprise 500 MFP M525DN
          HP LaserJet Enterprise 500 MFP M525F
          HP LaserJet Enterprise P3010
          HP LaserJet Enterprise P3015
          HP LaserJet Enterprise P-3015 N
          HP LaserJet Enterprise P3015D
          HP LaserJet Enterprise P3015DN
          HP LaserJet Enterprise P3015X
          HP LaserJet Enterprise flow MFP M-525 C
          HP LaserJet Pro MFP M-521 DW