From the manufacturer
This cartridge works with: HP Color LaserJet 5500, 5500dn, 5500dtn, 5500hdn, 5500n, 5550, 5550dn, 5550dtn, 5550hdn, 5550n
Cartridge yield (approx.): 12,000 pages
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What’s in the box: 1 new Original HP 645A Cyan Toner Cartridge (C9731A)