The component with the lowest price in the FRONT BRAKE HOSE schematic is the Washer(10x15x1.5).
Parts such as the Front Brake Hose: Union, Washer(10x15x1.5), Hose Comp,fr B, Clamp,fr Brake Hose are included in the Gsxr600 2004 (k4) Usa (e03) Front Brake Hose parts fiche.
Check out any of the nine Front Brake Hose components enlisted.