This Givi SR5129 Rear Rack Carrier BMW F850 GS 2019 on models is designed to accept a Givi Monokey Plate or a Givi Monolock Plate enabling a corresponding top case or box to be fitted or as a sturdy base for soft luggage. For a Givi Monokey Case a Givi M5 Monokey Plate, a Givi M9A Aluminium Monokey Plate or a Givi M9B Aluminium Monokey Plate Black is required and for a Givi Monolock Top Box either a Givi M5M Monolock Plate or a Givi M6M Monolock Plate is required. Please note that this rear rack carrier can only be fitted in combination with the original BMW plastic rack. If you have the BMW Aluminium Rack fitted you will require the Givi SRA5127 Aluminium Rear Rack BMW F850 GS 2019 on models instead. Please also note that this Givi SR5129 has the 2 supports, their fittings and the instructions included and not a top plate. If this rear rack is to have the Givi M9A, Givi M9B, Givi M8A or the Givi M8B Aluminium Plates fitted there is no facility to accept an additional stop light or remote control device on to the rear case.