Check out any of the seven Rear Shock Absorber components enlisted.
The Trx450es Fourtrax Foreman Es 2000 (y) Usa Rear Shock Absorber consists of seven pieces with the Cushion Assy,rear being the most expensive.
Some items from this specific schematic: Bush,damper, Nut,self Lock,10m, Bolt,flange,10x40, Cushion Assy,rear.