A sample from the products for the 2nd Air include: Clip, Pipe,2nd Air No.4, Valve Assy,2nd Air, Gasket,2nd Air Pipe (nas).
The Washer(6.5x20x1.6) is the cheapest item from this partsfiche.
The sub assemblies and components that make up this 2nd Air include this Valve Assembly,second Air, the most expensive part.