The Gasket Kit A assembly is constructed from several parts from which the Gasket,cylinder H (nas) is the most expensive.
The most reasonably priced component used on the Nx250 1989 (k) Usa California Gasket Kit A is the Washer,7mm.
Some items from this specific schematic: Wash,sealing,7mm, Washer,7mm, Washer C,8mm, Wash,sealing,6mm.