In this schematic the "Wash,sealing,8mm" is used most often.
The component with the lowest price in the GASKET KIT B(CB13008/S8/A 8/SA8) schematic is the Washer,plug Drain 14.
The Gasket Kit B(cb13008/s8/a 8/sa8) is made up of components including this Washer O-ring Kit which is the most expensive.