The Exhaust Valve (model W) is made up of components including this Valve Exhaust Main which is the most expensive.
The lowest price component in this Exhaust Valve (model W) parts-list fiche is the Ball.
A sample from the products for the Exhaust Valve (model W) include: Shim(19.1x25x0.3), Washer, Bearing(10x22x2.8), Lever,exhaust Valve No.2.