The lowest price component in this Reserve Tank - Breather Separator parts-list fiche is the Clip B12,tube.
The Reserve Tank - Breather Separator is made up of components including this Separator,brthr. which is the most expensive.
Some items from this specific schematic: Clip C,brthr.tube, Clip,tube, Tube,fuel,7.3x920, Tube B,breather.