Compatible developer unit chip for models DV311 and DV512.Designed to work with printer models C220, C280, C360, C7222, C224, C284, C364, C454, C554, C452, C552, and C652.proper communication between the developer unit and the printer for consistent performance.Easy to install and helps maintain device functionality. Compatibility Disclaimer: This is not an OEM item.Mentioned brands/models are used strictly for fitment illustration.