Conversion set to GTA system for top cases or boxes. Accessories equipped with the GTA Coupling II, such as boxes or top cases, can be placed in the upper receptacle of the luggage carrier adapter plate and securely clicked into place by sliding them forward. The accessories are secured by a central locking system and can be easily removed at the touch of a button. Accessories with UniKlip, Racktime, Snapit, MIK adapters can be easily converted to the GTA system, as the drill holes on the bottom are identical. Loadable up to max. 10 kg.