The most reasonably priced component used on the T9.9(mh/eh/er)v 1997 Repair Kit 1 is the Ybs67-4 Washer, Spring.
Of all the components used in this assembly the Gasket Kit, Power Unit (nas) is the most expensive.
This schematic depicts all components used in the T9.9(mh/eh/er)v 1997 Repair Kit 1 partslist.