Parts such as the Front Fork (dr400st, E15, E17): Screw, Band,fork Cover Boot, Oil Seal,front Fork, Inner Tube, Lh are included in the Dr400s 1980 (t) Front Fork (dr400st, E15, E17) parts fiche.
The sub assemblies and components that make up this Front Fork (dr400st, E15, E17) include this Inner Tube, the most expensive part.