The Washer,plain, 6mm is the lowest priced item on this Rear Fork - Drive Chain schematic.
Of all the components used in this assembly the Swingarm, Rr. *nh1* is the most expensive.
A sample from the products for the Rear Fork - Drive Chain include: Swingarm, Rr. *nh1*, Bush,fork Pivot, Washer,plain, 6mm, Bolt,fork Pivot.