The AV Stumpfl VARIO insert nut M8 for SHIFT Legs is a screen modification and frame-system component for VARIO systems. It is an M8 insert nut intended for use with SHIFT Legs. The component is supplied as one piece and is not a projection screen or surface; therefore, projection area, aspect ratio, gain and projection type do not apply. Manufacturer article number: BVZ-MOD/EM/SHIFT.