This schematic depicts all components used in the Gl1500 Goldwing 1989 (k) Spain / Kph Air Pump partslist.
A sample from the products for the Air Pump include: Circlip,intl,50mm, End,piece, Hose Comp, Filter (c).
The Bolt,flange 6x18 is the lowest priced item on this Air Pump schematic.