The AV Stumpfl AT64-SHIFT left-side extension is a mechanical system component measuring 107 cm in length. It is finished in black and specified for the 21–62 configuration. The component is intended for use with the AT64-SHIFT system and is supplied as an individual piece. Manufacturer code BFZ-FST/B/64S/1067L1. No projection, signal, connector, or screen-surface specifications are provided.