Features
# Get crisp, sharp results in color and black and white
# Depend on genuine HP ink for high-quality, long-lasting results
# Maximize your ink efficiency: get fast results and superior fade resistance while using less ink with HP's Vivera inks
# Stay on top of ink replacement with HP SureSupply™1: receive alerts when a cartridge is low, monitor its remaining life, and enjoy easy online ordering or check stock and prices at nearby stores


Specifications
Ink volume: Two 5 ml cartridges

HP 21 Ink Cartridge is compatible Printers: 

HP 1250 Fax (Q8096A)
HP Deskjet 3930 Color Inkjet Printer (C9067A)
HP Deskjet 3940 Color Inkjet Printer (C9050A)
HP Deskjet D2330 Printer (C9081A)
HP Deskjet D2360 Printer (C9079A)
HP Deskjet D2430 Printer (CB614A)
HP Deskjet D2460 Printer (CB611A)
HP Deskjet F2110 All-in-One (CB601A)
HP Deskjet F380 All-in-One (Q8134A)
HP Deskjet F4180 All-in-One (CB584A)
HP Officejet 4315 All-in-One (Q8081A)
HP PSC 1410 All-in-One (Q7290A)