This E-series model-specific adapter plate is designed to add a Givi Monokey or Monolock case to your existing OEM tail section. Adapter plate is durable molded nylon. Rugged black finish. All necessary mounting hardware and installation diagram included. For use with or without TB531 passenger backrest.All hardware needed to mount the Givi rack is included. Installs quickly using simple hand tools. Choose plate type appropriate for the topcase to be used with the E531: M5 plate - required for Monokey cases (kit sold as "E531"); M5M plate - required for Monolock cases (kit sold as "E531M").