HP 917122-001 DVD Writer is an internal optical drive for reading and writing DVD media. Its ultra-slim form factor is intended for a matching slim drive bay, making it a compact optical-drive option for a compatible desktop system.
The distributor lists the HP ProDesk 400 G4 as a compatible system and specifies a drive height of 0.4 inches. The HP parts reseller also describes this part number as a 9.5mm slim DVD RW drive, corroborating its compact form factor.
This is part number 917122-001; the listing identifies it as an internal DVD-Writer. Compatibility and fit details in these descriptions are limited to the information confirmed for this exact part.