The AV Stumpfl Vario64 middle strut is a frame system component for Vario64 structures. This version has a length of 90 cm and is supplied without studs or press buttons. It is identified by manufacturer article number BVV-X/MST/X090. The stated gross and net weight is 0.96 kg. As a frame component, it is not a projection screen or surface and has no projection-related specifications.