The most reasonably priced component used on the Gsx600f Katana 1996 (t) Usa (e03) Front Brake Hose is the Washer(10x15x1.5).
Some items from this specific schematic: Washer(10x15x1.5), Union, Hose,front Brake, Adapter,brake Hose.
With nine applications this Washer(10x15x1.5) is the most specified part.