The lowest price component in this Rear Cushion Lever (model W) parts-list fiche is the Seal,oil(20x26x4.5).
A sample from the products for the Rear Cushion Lever (model W) include: Bolt,rear Cushion Lever, Nut 12mm, Rod Set,rear Cushion, Bearing(20x26x12).
In this schematic the "Bearing(22x28x16)" is used most often.