The AV Stumpfl monoblox64 middle strut is a frame or system component for monoblox64 configurations with a 21:9 aspect ratio and dimensions of 386 x 174 cm. It is designed to provide central support within the frame structure and is supplied as an individual structural component, not as a projection surface or complete screen. The manufacturer code is BXV-XU386/MST, and the product weight is 4.6 kg.