Parts such as the Air Cleaner: Nut,element Sett., Elemnt,cleaner, Grommet,, Grommeta,case are included in the Cb250k4 Australia / Mph Air Cleaner parts fiche.
The Screw,cross,5x16 is the lowest priced item on this Air Cleaner schematic.
This Elemnt,cleaner is the most expensive of the items that make up this Air Cleaner assembly.