From the manufacturer
This cartridge works with: HP LaserJet Enterprise 500 MFP M525dn, M525f; HP LaserJet Enterprise Flow MFP M525c; HP LaserJet Enterprise P3015d, P3015dn, P3015n, P3015x; HP LaserJet Pro MFP M521dn
Cartridge yield (approx.): 6,000 pages
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What’s in the box: 1 new Original HP 55A Black Toner Cartridge (CE255A)
Original HP LaserJet LaserJet 55A Print Cartridge in retail packaging
Approximate cartridge yield: 6,000 standard pages (declared yield value in accordance with ISO/IEC 19752)
Compatibility: HP LaserJet P3015 Printer
Toner Color: Black