The AV Stumpfl monoblox64 middle strut is a black-anodized frame component designed for 21:9 systems. It is specified for systems measuring 691 × 303 cm (22 ft 8 in × 9 ft 11 in). The component belongs to the monoblox64 product series and is identified by manufacturer article number BXW-XU691/MST. It is supplied as one piece and has a net weight of 4.46 kg. It is a structural system component, not a projection surface or screen.