The VarioLock64 middle strut from AV Stumpfl is a frame component for the VarioLock64 system. It has a specified length of 40 cm and is supplied without studs or press buttons. The component is identified by manufacturer article number BVL-X/MST/X040 and has a net weight of 0.83 kg. It is intended for integration into the VarioLock64 frame system and is not a projection screen or projection surface.