This is a 5 pack of all the ink from the Q6000 SERIES (BLACK & ALL COLORS).  Each pack has 4 cartridges.   

Specifically 5 of each below per 5 Pack:

Q6000A- Black 
Q6001A- Cyan
Q6002A - Yellow
Q6003A - Magenta

HP Q6000A, Q6001A, Q6002A, Q6003A / HP 124A TONER SET

Why buy the items individually?  Buy all colors, black, cyan, magenta, yellow for a great low price.

Product Features:

Designed to work precisely with HP Color LaserJet 2600n printers.
It's simple. Reliable HP Color LaserJet supplies provide hassle-free color.
HP Smart features save your valuable time, making HP supplies a great value.
Professional result every time. HP color makes your point clear.
 
This is a set of genuine HP toner cartridges.  

Manufacturer: HP
Manufacturer's Product Number: 124A
Condition: New