A sample from the products for the Rear Cushion include: O-ring 39.7x3.5, Bearing,needle 19, Label,rr Damper, Washer,spring Sea.
The O-ring,21.5x1.5 is the lowest priced item on this Rear Cushion schematic.
Of all the components used in this assembly the Damper Comp,rear is the most expensive.