The AV Stumpfl MonoClip middle strut is a frame system component for constructing a 21:9 projection frame measuring 447 x 200 cm. It is designed for use with the MonoClip system and serves as the central support strut. The component is supplied as an individual piece and has a net and gross weight of 1.1 kg. The manufacturer article number is BMV-XU447/MST. No projection surface, screen electronics, or video signal interfaces are specified.