The AV Stumpfl VarioClip Lock middle strut is a black frame or system component for the VarioClip Lock product series. It has a specified length of 47 cm and is supplied as one piece. The component is not a projection screen or surface and therefore has no projection area, aspect ratio, projection type, or surface gain specification. Manufacturer: AV Stumpfl. Article number: BCM-X/MST/X047.