HP 840964-001 Plastics Kit is a replacement parts kit listed for the ZBook Studio G4 Mobile Workstation. It brings together small inserts for the notebook’s reader openings, useful when servicing a compatible system or replacing a missing insert.
The kit includes a fingerprint reader insert and a card reader insert. HP specifies that the fingerprint reader insert is for models without a fingerprint reader. The card reader insert is also identified as part of the kit.
This is a focused plastics kit rather than a complete laptop assembly. Its purpose is to provide the two listed inserts for the ZBook Studio G4; the service guide does not specify additional contents.