Check out any of the nine Air Cleaner components enlisted.
Parts such as the Air Cleaner: Case,air Cleaner, Screw,cross 4x16, Band,air/c.tube, Element,air/c are included in the Z50j Monkey 1989 (k) Finland Air Cleaner parts fiche.
The Air Cleaner assembly is constructed from several parts from which the Case,air Cleaner is the most expensive.