The Washer(10x15x1.5) is the lowest priced item on this Rear Brake Hose (gsf1200sav/saw/sax) schematic.
Of all the components used in this assembly the Sensor,rr Wheel Abs is the most expensive.
This REAR BRAKE HOSE (GSF1200SAV/SAW/SAX) assembly utilises four Washer(10x15x1.5)(s) - the highest specified component.