The AV Stumpfl Vario64 middle strut is a frame or system component for the Vario64 series. This version is supplied without studs and is identified by manufacturer code BVV-X/MST/X. The product data specifies a length in centimetres, but no numerical length, width or height is provided. As a frame component rather than a projection screen or surface, it has no projection area, aspect ratio, gain value or projection size.