This EOP-1 assembly utilises two Seal Valve Stem(s) - the highest specified component.
The component with the lowest price in the EOP-1 schematic is the Gasket,water Pump.
The Chx50 Giorno Crea (dx) 1999 (x) Japan Af54-100 Eop-1 consists of twelve pieces with the Gasket Kit,a (nas) being the most expensive.