On this parts fiche the Cushion is the most specified component.
The Gsf600s 1997 (v) (e02 E04 E17 E18 E22 E24 E25 E34) Seat (model T/v/w) consists of sixteen pieces with the Seat Assy being the most expensive.
Of all the components that make up this Seat (model T/v/w) the Cushion has the lowest price.