Q6470A/ Q6471A/ Q6472A/ Q6473A Cartridges for HP Color LaserJet 3600 Series Printers Best Real Savings Option for Corporations, Educational Institutions, Non-Profit Organizations, and Businesses in printing Business (Tax Preparation, Illustration, School related, legal documents, any paperwork, etc...) Prints like original! Page Yield: Q6470A Black Print Cartridge (6,000 Yield),Q6471A Cyan Print Cartridge (4,000 Yield),Q6472A Yellow Print Cartridge (4,000 Yield),Q6473A Magenta Print Cartridge (4,000 Yield) Compatible Hardware:HP COLOR LASERJET 3600, 3600DN, 3600N