The Front Brake Caliper (st1100) assembly is constructed from several parts from which the Caliper Sub Assy, is the most expensive.
Some items from this specific schematic: Cap,bleeder, Bracket Comp.,l.f, Bolt,socket,8x36, Bush,pin.
The lowest price component in this Front Brake Caliper (st1100) parts-list fiche is the Bolt,flange,8x32.