The AV Stumpfl BVZ-MOD/EMH is a set of press studs for modifying an AV Stumpfl projection screen for portrait-format use. The article list identifies the item as a projection-screen modification accessory and specifies the unit as SET. It is associated with the VARIO screen modification designation in the German description. No dimensions, projection area, screen material, connectors, or video signal specifications are provided in the available documentation.