The most reasonably priced component used on the Gsx750 1980 (t) (e01 E02 E06 E22 E24) Front Brake Hose is the Washer.
The Front Brake Hose is made up of components including this Hose,brake No.2 which is the most expensive.
This FRONT BRAKE HOSE assembly utilises four Washer(s) - the highest specified component.