Of all the components used in this assembly the Calipers Assy is the most expensive.
The most reasonably priced component used on the Zr50sk 1987 (h) (e02 E16 E21) Calipers (e2,e21) is the Screw.
This schematic depicts all components used in the Zr50sk 1987 (h) (e02 E16 E21) Calipers (e2,e21) partslist.