Some items from this specific schematic: O Ring,26mm, Packing, Oil Cap (nas), O Ring.11.8x2.4, Gasket.kit.b (nas).
The component with the lowest price in the GASKET KIT B schematic is the Washer,plug Drain 14.
This GASKET KIT B assembly utilises two O-ring,3.7x1.5(s) - the highest specified component.