The Seal 2 is the lowest priced item on this Oil Tank schematic.
A sample from the products for the Oil Tank include: Body, Cap, Screw, Binding, Oil Level Gauge Assy, Tank Oil+ Oil Level Gauge.
This schematic depicts all components used in the Ew50 2003 5wk1 England 1b5wk-300s1 Oil Tank partslist.