Model Compatibility: Compatible with printer models C220, C280, C224, C284, C364, C454, C554, C284e, and C364e.
Part Number Compatibility: Replacement for DR311 OPC drum and DR512 cylinder drum components as specified in the title.
Quantity Included: Package contains five (5) identical drum units for bulk replacement use.
Functional Purpose: Restores function as a direct-fit replacement drum component for designated printers.
Installation Scope: Designed for use only in the listed printer models without modification or adaptation.