The O-ring,2.5x1.5 is the lowest priced item on this Front Brake Caliper (fes1257/a7)(fes1507/a7) schematic.
With a quantity of two pieces, the Seal Set,piston is the most used part in the FRONT BRAKE CALIPER (FES1257/A7)(FES1507/A7) diagram.
seventeen components are shown in this Fes150 Pantheon 2007 (7) England / Mkh Front Brake Caliper (fes1257/a7)(fes1507/a7) exploded diagram.