Set of optical drive mounting brackets for use with combo and superdrives on all non-DVI models of Titanium PowerBook G4 i.e. 400MHz, 500MHz, 550MHz & 667MHz (non-DVI). These screw onto either side of the optical dribe and include rubber anti-shock mounts. Screws included. These brackets are not required when fitting the Apple OEM DVD-ROM drive. If you are fitting a combo or superdrive to a Titanium PowerBook which previously had a DVD-ROM drive, you will need this bracket set, an optical drive bezel and the combo optical cable (TBOPTCAB1).