The Grease(c)ep2 Lithium 150g is the lowest priced item on this Optional schematic.
The Optional assembly is constructed from several parts from which the Gasket Set (nas) is the most expensive.
A sample from the products for the Optional include: Grease(c)ep2 Lithium 150g, Key,blank, Thread Lock No.1303b Purpl 50g, Thread Lock No.1401 Clear 200g.