HP Compaq 320 Maintenance And Service Manual page 70

For a 35.6-cm (14-in) or 33.8-cm (13.3-in) computer, attach 1 piece of the 90× 8×0.5 mm rubber
bumper from spares kit 652168-001 to the outside of the hard drive bracket.
For a 35.6-cm (14-in) or 33.8-cm (13.3-in) computers using 7 mm thick hard drives, attach 2 pieces
of 13×9.5×3.1 mm rubber bumper from spares kit 652168-001 to the hard drive.
62 Chapter 4 Removal and replacement procedures