The E-12 Oil Filter - Oil Pan is made up of components including this Pan,oil which is the most expensive.
The Washer,plug,drain 12 is the cheapest item from this partsfiche.
Parts such as the E-12 Oil Filter - Oil Pan: Bolt,flange, 6x32, Spring,element, Drain Cock, Collar,oil Filter are included in the Cb650 1979 (z) E-12 Oil Filter - Oil Pan parts fiche.