The most expensive part in this assembly is the Shockabsorber.
On this parts fiche the Ring-o,19.8x2.2 is the most specified component.
Parts such as the Suspension/shock Absorber: Ring-o,19.8x2.2, Sleeve,12.1x20x22, Sleeve,12.1x20x70, Bushing are included in the Ex250h11 Ninja 250r 2000 Canada Suspension/shock Absorber parts fiche.