In this schematic the "Seal Set,piston" is used most often.
Parts such as the Front Brake Caliper(cb600 F/f3): Retainer,brkt, Bush,pin, Brkt Sub Assy,fr, Caliper Sub Assy, are included in the Cb600f3 Hornet 2009 (9) European Direct Sales / St Front Brake Caliper(cb600 F/f3) parts fiche.
Of all the components used in this assembly the Caliper Sub Assy, is the most expensive.