The AV Stumpfl monoblox64 middle strut is a frame or system component for constructing a 4:3 monoblox64 projection system. It is specified for systems measuring 386 x 294 cm (12 ft 8 in x 9 ft 8 in). The component is supplied as one piece and has a gross and net weight of 2.2 kg. Its manufacturer article number is BXV-XV386/MST. No projection surface, video connections, or individual strut dimensions are specified.