AV Stumpfl monoblox64 middle strut designed for 4:3 frame systems with a nominal size of 447 × 340 cm. The component is intended to provide central support within the monoblox64 frame structure. It is supplied as a single piece and has a net weight of 5.5 kg. The listed product code is BXV-XV447/MST. No projection surface, video signal interfaces, or electronic functions are specified.