The Washer(6a1) is the lowest priced item on this Fuel Tank schematic.
This part-list fiche shows all the components that make up the Ce50et 1987 Riva Jog Fuel Tank .
A sample from the products for the Fuel Tank include: Seat, Rubber, Pipe, Fuel 1, Clip(47x), Gasket, Plate 1 (nas).