The AV Stumpfl Mobile screen fixing clamp is a frame-system accessory for securing a mobile screen assembly. It is designed for compatibility between an S64 leg and an S64 frame, as indicated by the designation Leg-S64/Frame-S64 . The clamp is supplied as a standalone component under article number BVZ-KH/64/64. It is not a projection screen or projection surface and has no projection area, aspect ratio, gain, or screen dimensions specified.