HP 793521-001 EMI shield is a replacement part for the 5.25-inch optical disc drive bay in an HP Z440 workstation. It is intended for the ODD bay, helping restore the bay’s EMI shielding when its shield needs replacement.
The listing identifies it as an SPS shield and ties the full part number 793521-001 to the Z440. Its 5.25-inch designation specifies the bay it is made for; this is a bay shield, not an optical drive.
It is listed as compatible with HP Z440 workstation models. Use it as the replacement shield for the matching optical drive bay.