What is the ink type and drop size of the HP 728 cartridge?

The ink type of the HP 728 cartridge is dye-based, and the ink drop size is 6 picoliters.

What printers are compatible with the HP 728 300-ml Magenta DesignJet Ink Cartridge?

The HP 728 300-ml Magenta DesignJet Ink Cartridge is compatible with the HP DesignJet T730 Printer and the HP DesignJet T830 Multifunction Printer.

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HP 728 300-ml Magenta DesignJet Ink Cartridge, F9K16A

Compatible Printers: HP DesignJet T730 Printer, HP DesignJet T830 Multifunction Printer