In this schematic the "Seal,fr Calipe" is used most often.
Parts such as the Rear Caliper (model M/n): Piston Set, Clip,pad Pin, Bolt, Seal,fr Calipe are included in the Gsx1100g 1991 (m) Usa (e03) Rear Caliper (model M/n) parts fiche.
Check out any of the nineteen Rear Caliper (model M/n) components enlisted.