The 033 Rear Suspension assembly is constructed from several parts from which the Rear Shock Absorber is the most expensive.
The most reasonably priced component used on the M620dark 2005 Eu (monster 620dark Monodisco) 9151-1423d 033 Rear Suspension is the Spacer.
A sample from the products for the 033 Rear Suspension include: Screw, Spacer, Spindle, Taper, Spindle, Taper.