The fourteen Gsf1200s 2000 (y) (e02 E04 E17 E18 E22 E24 E25 E34) Rear Caliper (gsf1200sav/saw/sax) component parts are all listed in this schematic.
Some items from this specific schematic: Pin,pad, Bleeder, Caliper Assembly,rear, Spring.
The Rear Caliper (gsf1200sav/saw/sax) assembly is constructed from several parts from which the Caliper Assembly,rear is the most expensive.