For use in Enterprise 500 MFP M525dn, Enterprise 500 MFP M525f, Enterprise flow MFP M525c, LaserJet 500 MFP M525dn, LaserJet 500 MFP M525f, LaserJet flow MFP M525c, LaserJet P3010, LaserJet P3015 LaserJet P3015d, LaserJet P3015dn, LaserJet P3015n, LaserJet P3015x, LaserJet Enterprise 500 MFP M525dn, LaserJet Enterprise flow MFP M525c, LaserJet Pro M521dn MFP, LaserJet Pro MFP M521dw Compatible Replacements Included: 2 HP55A Black Toner Cartridge / CE255A Toner Cartridge Delivers 6,000 pages just like the original HP LaserJet 55A Toner Cartridge *Average cartridge page yield in accordance with ISO 19752 Professionally manufactured by LD Products. HP is a registered trademark of HP Inc. and is not affiliated with and does not endorse LD Products.