The HP LaserJet Black Managed Imaging Drum W9077MC is a black-channel imaging drum for compatible HP Color LaserJet Managed MFP printers. It is a printer supply intended for the imaging system, rather than a toner cartridge.
The listed compatible range includes the E87740, E87750, E87760 and E87770 families, with dn and Flow versions. The distributor also lists the E877z Flow, E877 Core and E877dn models. This helps identify the device range for which this specific drum is listed.