Apple PowerBook 165 - Manual (Page 103)

Take Apart Hard Drive - 43
Replacement Note:
Drive
retainers for 17-mm-high
and 19-mm-high hard
drives are not
interchangeable. Check the
height of the replacement
drive and use the
appropriate drive retainer.
If you are upgrading from a
40 MB to 80 MB hard drive,
use the ridged, 17-mm
retainer that shipped with
the 80 MB hard drive.