In this schematic the "Hose,air Feed" is used most often.
A sample from the products for the Tubing (1) include: Tube O,pb, Tube C,pb, Clamper J,hose, Tube P,pb.
The most reasonably priced component used on the Gl1500a Goldwing Aspencade 1997 (v) Austria / Kph Tubing (1) is the Screw,tap.5x10.