The most expensive part in this assembly is the Hose,front Brake.
This schematic depicts all components used in the Gs400 1979 (n) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Brake Hose partslist.
The Washer is the lowest priced item on this Brake Hose schematic.