AV Stumpfl monoblox64 middle strut designed for 4:3 screen frames measuring 325 × 249 cm (10'8" × 8'2"). This component is intended for use within the monoblox64 frame system as a central support strut. It is supplied as an individual piece and has a net weight of 5.7 kg. The manufacturer article number is BXV-XV325/MST.