HP RC4-3219-000CN Full Detect Sensor Cover is a replacement printer component identified for covering the full detect sensor. Its exact part number helps distinguish it when sourcing a service part for a compatible LaserJet printer.
The listing names HP LaserJet Enterprise M507 and M528 models, HP LaserJet Managed E50145DN and E52645 models, and HP LaserJet Pro M304, M305, M402, M404, M405, M329 and M429 models as compatible. The cover is listed as an HP Inc part in new condition.