The slat facade, System 774, from MLL Hamburg, is a facade system made of aluminium with a free ventilation cross section of 48%. The System 774 is equipped with a Z-slat of the heavy series of type 070. Fastening to a facade occurs via the Retaining rail 004. The slats are fastened with the MLL clip system and are also removable afterwards for repair work on on the facade or similar purposes.