Print Resolution Technology: HP Thermal Inkjet 4.0.
Ink Drop Size: 6 pl (picoliters).
Printhead Swath: 1.125 inches.
Compatible Ink Types: Dye-based for Cyan, Magenta, and Yellow; Pigment-based for Matte Black.
Operating Conditions: 5° to 40°C (41° to 104°F) with a humidity range of 20% to 80% RH.

Verified Compatibility
The F9J81A kit is the direct replacement for the printhead assembly in the following models:
HP DesignJet T730 Printer.
HP DesignJet T830 Multifunction Printer (including 24-inch and 36-inch variants).