The AV Stumpfl Vario64 middle strut is a frame or system component for Vario64 assemblies. This version has a length of 40 cm and is supplied without studs or snap fasteners. The component is identified by manufacturer article number BVV-X/MST/X040. Its net weight is 0.75 kg, and the unit is supplied as one piece. No projection surface, projection area, aspect ratio, or projection type is specified.